Subject: [Mgs] Electrical Nightmare

From: Michael MacLean via Mgs <[email-masked]>
Date: Thu, 16 Jan 2020 19:06:48 +0000 (UTC)

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In an earlier post I told how my tach in my 69 GT would die when the headli=
ghts were turned on.=C2=A0 Someone mentioned that the tach was looking for =
a ground through the light wiring for the instrument.=C2=A0 That turned out=
 to be true, somewhat.=C2=A0 To test this I pulled the instrument to inspec=
t the wiring and found what you see in the picture.=C2=A0 One arrow points =
to the ground connection on the back of the case and the other arrow points=
 to a common ground just floating around behind the instrument.=C2=A0 For a=
n experiment I slipped the ground wire connector over the threaded mouting =
stud of the case back and shoved the tach back into place temporarily to fi=
nd out about the missing ground theory.=C2=A0 It worked!=C2=A0 You didn't t=
hink it was going to be that easy did you?=C2=A0 The light had not illumina=
ted the instrument before either, so after scraping and sanding the bulb hl=
der and the tube fitting on the back of the tach that the bulb shoves into,=
 the light worked too, but wait there's more!=C2=A0 After this hollow victo=
ry I had to use the horn on the test drive.=C2=A0 Now the horn does not wor=
k, but when I push on the steering wheel stalk to activate the horn, the br=
ake warning light comes on.=C2=A0 I just love electrical problems.=C2=A0 No=
t in my element here.=C2=A0 Any ideas?Mike MacLean

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<html><head></head><body><div class=3D"yahoo-style-wrap" style=3D"font-fami=
ly:times new roman, new york, times, serif;font-size:16px;"><div dir=3D"ltr=
" data-setdir=3D"false">In an earlier post I told how my tach in my 69 GT w=
ould die when the headlights were turned on.&nbsp; Someone mentioned that t=
he tach was looking for a ground through the light wiring for the instrumen=
t.&nbsp; That turned out to be true, somewhat.&nbsp; To test this I pulled =
the instrument to inspect the wiring and found what you see in the picture.=
&nbsp; One arrow points to the ground connection on the back of the case an=
d the other arrow points to a common ground just floating around behind the=
 instrument.&nbsp; For an experiment I slipped the ground wire connector ov=
er the threaded mouting stud of the case back and shoved the tach back into=
 place temporarily to find out about the missing ground theory.&nbsp; It wo=
rked!&nbsp; You didn't think it was going to be that easy did you?&nbsp; Th=
e light had not illuminated the instrument before either, so after scraping=
 and sanding the bulb hlder and the tube fitting on the back of the tach th=
at the bulb shoves into, the light worked too, but wait there's more!&nbsp;=
 After this hollow victory I had to use the horn on the test drive.&nbsp; N=
ow the horn does not work, but when I push on the steering wheel stalk to a=
ctivate the horn, the brake warning light comes on.&nbsp; I just love elect=
rical problems.&nbsp; Not in my element here.&nbsp; Any ideas?</div><div di=
r=3D"ltr" data-setdir=3D"false">Mike MacLean<br></div></div></body></html>
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From: Max Heim via Mgs <[email-masked]>
Date: Thu, 16 Jan 2020 11:19:52 -0800

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I think you still have a ground problem. Should the steering column have =
a separate ground wire on a 69? I know there is one in the turn signal =
harness.

It does help to consult the wiring diagram, to figure out where the =
common grounds are.

--
Max Heim
'66 MGB

> On Jan 16, 2020, at 11:06 AM, Michael MacLean via Mgs =
<[email-masked]> wrote:
>=20
> In an earlier post I told how my tach in my 69 GT would die when the =
headlights were turned on.  Someone mentioned that the tach was looking =
for a ground through the light wiring for the instrument.  That turned =
out to be true, somewhat.  To test this I pulled the instrument to =
inspect the wiring and found what you see in the picture.  One arrow =
points to the ground connection on the back of the case and the other =
arrow points to a common ground just floating around behind the =
instrument.  For an experiment I slipped the ground wire connector over =
the threaded mouting stud of the case back and shoved the tach back into =
place temporarily to find out about the missing ground theory.  It =
worked!  You didn't think it was going to be that easy did you?  The =
light had not illuminated the instrument before either, so after =
scraping and sanding the bulb hlder and the tube fitting on the back of =
the tach that the bulb shoves into, the light worked too, but wait =
there's more!  After this hollow victory I had to use the horn on the =
test drive.  Now the horn does not work, but when I push on the steering =
wheel stalk to activate the horn, the brake warning light comes on.  I =
just love electrical problems.  Not in my element here.  Any ideas?
> Mike MacLean
>=20
> Donate: http://www.team.net/donate.html
> Suggested annual donation  $12.75
>=20
> Archive: http://www.team.net/pipermail/mgs =
http://autox.team.net/archive
>=20
> Unsubscribe: =
http://autox.team.net/mailman/options/mgs/[email-masked]

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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dus-ascii"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D"">I think you still have a ground problem. Should the steering =
column have a separate ground wire on a 69? I know there is one in the =
turn signal harness.<br class=3D""><div class=3D""><br =
class=3D"webkit-block-placeholder"></div><div class=3D"">It does help to =
consult the wiring diagram, to figure out where the common grounds =
are.</div><div class=3D""><br class=3D""></div><div class=3D""><br =
class=3D""></div><div class=3D"">
<div style=3D"color: rgb(0, 0, 0); letter-spacing: normal; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: =
break-word; -webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space;" class=3D""><div style=3D"color: rgb(0, 0, 0); =
letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D""><div style=3D"margin: 0px; font-size: 13px;" =
class=3D"">--</div><div style=3D"margin: 0px; font-size: 13px; =
min-height: 16px;" class=3D"">Max Heim</div><div style=3D"margin: 0px; =
font-size: 13px;" class=3D"">'66 MGB</div></div></div>
</div>

<br class=3D""><div><blockquote type=3D"cite" class=3D""><div =
class=3D"">On Jan 16, 2020, at 11:06 AM, Michael MacLean via Mgs &lt;<a =
href=3D"mailto:[email-masked]" class=3D"">[email-masked]</a>&gt; =
wrote:</div><br class=3D"Apple-interchange-newline"><div class=3D""><div =
class=3D""><div class=3D"yahoo-style-wrap" style=3D"font-family:times =
new roman, new york, times, serif;font-size:16px;"><div dir=3D"ltr" =
data-setdir=3D"false" class=3D"">In an earlier post I told how my tach =
in my 69 GT would die when the headlights were turned on.&nbsp; Someone =
mentioned that the tach was looking for a ground through the light =
wiring for the instrument.&nbsp; That turned out to be true, =
somewhat.&nbsp; To test this I pulled the instrument to inspect the =
wiring and found what you see in the picture.&nbsp; One arrow points to =
the ground connection on the back of the case and the other arrow points =
to a common ground just floating around behind the instrument.&nbsp; For =
an experiment I slipped the ground wire connector over the threaded =
mouting stud of the case back and shoved the tach back into place =
temporarily to find out about the missing ground theory.&nbsp; It =
worked!&nbsp; You didn't think it was going to be that easy did =
you?&nbsp; The light had not illuminated the instrument before either, =
so after scraping and sanding the bulb hlder and the tube fitting on the =
back of the tach that the bulb shoves into, the light worked too, but =
wait there's more!&nbsp; After this hollow victory I had to use the horn =
on the test drive.&nbsp; Now the horn does not work, but when I push on =
the steering wheel stalk to activate the horn, the brake warning light =
comes on.&nbsp; I just love electrical problems.&nbsp; Not in my element =
here.&nbsp; Any ideas?</div><div dir=3D"ltr" data-setdir=3D"false" =
class=3D"">Mike MacLean<br =
class=3D""></div></div></div>_____________________________________________=
__<br class=3D""><br class=3D""><a href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a><br class=3D"">Donate: =
&nbsp;$12.75<br class=3D""><br class=3D"">Archive: =
http://www.team.net/pipermail/mgs http://autox.team.net/archive<br =
class=3D""><br class=3D"">Unsubscribe: =
http://autox.team.net/mailman/options/mgs/[email-masked]<br =
class=3D""></div></blockquote></div><br class=3D""></body></html>=

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[email-masked]

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From: Max Heim via Mgs <[email-masked]>
Date: Thu, 16 Jan 2020 11:43:12 -0800

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I agree. That is something I did, too. Just thoroughly cleaning the =
contacts makes a huge difference. And you will probably find that a lot =
of those old connectors will be cracked and aren=E2=80=99t really =
gripping.

--
Max Heim
'66 MGB

> On Jan 16, 2020, at 11:40 AM, Hans Duinhoven <[email-masked]> =
wrote:
>=20
> Looking to your picture, I think it is better to do a thorough wiring =
job.=20
> It looks, like the car has been exposed to =E2=80=9Cnature=E2=80=9D =
for many times.=20
> This means, a lot of contacts are suspect of being poor or bad.=20
> So besides true fault finding, I=E2=80=99d dismantle all wiring and =
get all contacts cleaned.
> Clean all bullet connectors and replace all their interconnects.
> Clean all other connectors and replace these when they are bad.
> I did this with my BGT in 1996 and after that job I never had any =
electrical failures, besides a faulty alternator (diode pack) and =
starter solenoid, where the nut did not keep the 12 V wires fixed =
anymore.=20
> =20
> So get a matching electrical diagram of the car=E2=80=99s built year.
> The Haynes MGB manual always helped me out.
> =20
> Hope this helps for the long term.
> =20
> Cheers,
> Hans
> =E2=80=9971 BGT
> =20
> Van: Mgs [mailto:[email-masked]] Namens Max Heim via Mgs
> Verzonden: donderdag 16 januari 2020 20:20
> Aan: Michael MacLean
> CC: MGs
> Onderwerp: Re: [Mgs] Electrical Nightmare
> =20
> I think you still have a ground problem. Should the steering column =
have a separate ground wire on a 69? I know there is one in the turn =
signal harness.
common grounds are.

--Apple-Mail=_A38C9E92-2BA7-44A1-A35E-EA9852268605
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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D"">I agree. That is something I did, too. Just thoroughly =
cleaning the contacts makes a huge difference. And you will probably =
find that a lot of those old connectors will be cracked and aren=E2=80=99t=
 really gripping.<div class=3D""><br class=3D""><div class=3D"">
<div style=3D"color: rgb(0, 0, 0); letter-spacing: normal; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: =
break-word; -webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space;" class=3D""><div style=3D"color: rgb(0, 0, 0); =
letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D""><div style=3D"margin: 0px; font-size: 13px;" =
class=3D"">--</div><div style=3D"margin: 0px; font-size: 13px; =
min-height: 16px;" class=3D"">Max Heim</div><div style=3D"margin: 0px; =
font-size: 13px;" class=3D"">'66 MGB</div></div></div>
</div>

<br class=3D""><div><blockquote type=3D"cite" class=3D""><div =
class=3D"">On Jan 16, 2020, at 11:40 AM, Hans Duinhoven &lt;<a =
href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div =
class=3D"WordSection1" style=3D"page: WordSection1; font-family: =
Verdana; font-size: 12px; font-style: normal; font-variant-caps: normal; =
font-weight: normal; letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div style=3D"margin: =
0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', =
serif;" class=3D""><span lang=3D"EN-US" style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D"">Looking to your picture, I think it is better to do a =
thorough wiring job.<span =
class=3D"Apple-converted-space">&nbsp;</span><o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0cm 0cm 0.0001pt; =
font-size: 12pt; font-family: 'Times New Roman', serif;" class=3D""><span =
lang=3D"EN-US" style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D"">It looks, like the car =
has been exposed to =E2=80=9Cnature=E2=80=9D for many times.<span =
class=3D"Apple-converted-space">&nbsp;</span><o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0cm 0cm 0.0001pt; =
font-size: 12pt; font-family: 'Times New Roman', serif;" class=3D""><span =
lang=3D"EN-US" style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D"">This means, a lot of =
contacts are suspect of being poor or bad.<span =
class=3D"Apple-converted-space">&nbsp;</span><o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0cm 0cm 0.0001pt; =
font-size: 12pt; font-family: 'Times New Roman', serif;" class=3D""><span =
lang=3D"EN-US" style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D"">So besides true fault =
finding, I=E2=80=99d dismantle all wiring and get all contacts =
cleaned.<o:p class=3D""></o:p></span></div><div style=3D"margin: 0cm 0cm =
0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D""><span lang=3D"EN-US" style=3D"font-size: 11pt; font-family: =
Calibri, sans-serif; color: rgb(31, 73, 125);" class=3D"">Clean all =
bullet connectors and replace all their interconnects.<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0cm 0cm 0.0001pt; =
font-size: 12pt; font-family: 'Times New Roman', serif;" class=3D""><span =
lang=3D"EN-US" style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D"">Clean all other =
connectors and replace these when they are bad.<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0cm 0cm 0.0001pt; =
font-size: 12pt; font-family: 'Times New Roman', serif;" class=3D""><span =
lang=3D"EN-US" style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D"">I did this with my BGT =
in 1996 and after that job I never had any electrical failures, besides =
a faulty alternator (diode pack) and starter solenoid, where the nut did =
not keep the 12 V wires fixed anymore.<span =
class=3D"Apple-converted-space">&nbsp;</span><o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0cm 0cm 0.0001pt; =
font-size: 12pt; font-family: 'Times New Roman', serif;" class=3D""><span =
lang=3D"EN-US" style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div><div style=3D"margin: 0cm 0cm =
0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D""><span lang=3D"EN-US" style=3D"font-size: 11pt; font-family: =
Calibri, sans-serif; color: rgb(31, 73, 125);" class=3D"">So get a =
matching electrical diagram of the car=E2=80=99s built year.<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0cm 0cm 0.0001pt; =
font-size: 12pt; font-family: 'Times New Roman', serif;" class=3D""><span =
lang=3D"EN-US" style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D"">The Haynes MGB manual =
always helped me out.<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D""><span lang=3D"EN-US" style=3D"font-size: =
11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D""><o:p class=3D"">&nbsp;</o:p></span></div><div style=3D"margin: =
0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', =
serif;" class=3D""><span lang=3D"EN-US" style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D"">Hope this helps for the long term.<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0cm 0cm 0.0001pt; =
font-size: 12pt; font-family: 'Times New Roman', serif;" class=3D""><span =
lang=3D"EN-US" style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div><div style=3D"margin: 0cm 0cm =
0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D""><span lang=3D"EN-US" style=3D"font-size: 11pt; font-family: =
Calibri, sans-serif; color: rgb(31, 73, 125);" class=3D"">Cheers,<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0cm 0cm 0.0001pt; =
font-size: 12pt; font-family: 'Times New Roman', serif;" class=3D""><span =
lang=3D"EN-US" style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D"">Hans<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0cm 0cm 0.0001pt; =
font-size: 12pt; font-family: 'Times New Roman', serif;" class=3D""><span =
lang=3D"EN-US" style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D"">=E2=80=9971 BGT<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0cm 0cm 0.0001pt; =
font-size: 12pt; font-family: 'Times New Roman', serif;" class=3D""><span =
lang=3D"EN-US" style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div><div class=3D""><div =
style=3D"border-style: solid none none; border-top-width: 1pt; =
border-top-color: rgb(181, 196, 223); padding: 3pt 0cm 0cm;" =
class=3D""><div style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; =
font-family: 'Times New Roman', serif;" class=3D""><b class=3D""><span =
style=3D"font-size: 10pt; font-family: Tahoma, sans-serif;" =
class=3D"">Van:</span></b><span style=3D"font-size: 10pt; font-family: =
Tahoma, sans-serif;" class=3D""><span =
class=3D"Apple-converted-space">&nbsp;</span>Mgs [<a =
href=3D"mailto:[email-masked]" =
class=3D"">mailto:[email-masked]</a>]<span =
class=3D"Apple-converted-space">&nbsp;</span><b class=3D"">Namens<span =
class=3D"Apple-converted-space">&nbsp;</span></b>Max Heim via Mgs<br =
class=3D""><b class=3D"">Verzonden:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>donderdag 16 januari 2020 =
20:20<br class=3D""><b class=3D"">Aan:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>Michael MacLean<br =
class=3D""><b class=3D"">CC:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>MGs<br class=3D""><b =
class=3D"">Onderwerp:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>Re: [Mgs] Electrical =
Nightmare<o:p class=3D""></o:p></span></div></div></div><div =
style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D""><o:p class=3D"">&nbsp;</o:p></div><div =
style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D"">I think you still have a ground problem. =
Should the steering column have a separate ground wire on a 69? I know =
there is one in the turn signal harness.<o:p class=3D""></o:p></div><div =
class=3D""><div style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; =
font-family: 'Times New Roman', serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div></div><div class=3D""><div style=3D"margin: =
0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', =
serif;" class=3D"">It does help to consult the wiring diagram, to figure =
out where the common grounds are.<o:p class=3D""></o:p></div></div><div =
class=3D""><div style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; =
font-family: 'Times New Roman', serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div></div><div class=3D""><div style=3D"margin: =
0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', =
serif;" class=3D""><o:p class=3D"">&nbsp;</o:p></div></div><div =
class=3D""><div class=3D""><div class=3D""><div class=3D""><div =
style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D""><span style=3D"font-size: 10pt;" =
class=3D"">--<o:p class=3D""></o:p></span></div></div><div class=3D""><div=
 style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D""><span style=3D"font-size: 10pt;" =
class=3D"">Max Heim<o:p class=3D""></o:p></span></div></div><div =
class=3D""><div style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; =
font-family: 'Times New Roman', serif;" class=3D""><span =
style=3D"font-size: 10pt;" class=3D"">'66 MGB<o:p =
class=3D""></o:p></span></div></div></div></div></div><div =
style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D""><o:p class=3D"">&nbsp;</o:p></div><div =
class=3D""><blockquote style=3D"margin-top: 5pt; margin-bottom: 5pt;" =
class=3D"" type=3D"cite"><div class=3D""><div style=3D"margin: 0cm 0cm =
0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D"">On Jan 16, 2020, at 11:06 AM, Michael MacLean via Mgs &lt;<a =
href=3D"mailto:[email-masked]" style=3D"color: purple; =
text-decoration: underline;" class=3D"">[email-masked]</a>&gt; =
wrote:<o:p class=3D""></o:p></div></div><div style=3D"margin: 0cm 0cm =
0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D""><o:p class=3D"">&nbsp;</o:p></div><div class=3D""><div =
class=3D""><div class=3D""><div class=3D""><div style=3D"margin: 0cm 0cm =
0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D"">In an earlier post I told how my tach in my 69 GT would die =
when the headlights were turned on.&nbsp; Someone mentioned that the =
tach was looking for a ground through the light wiring for the =
instrument.&nbsp; That turned out to be true, somewhat.&nbsp; To test =
this I pulled the instrument to inspect the wiring and found what you =
see in the picture.&nbsp; One arrow points to the ground connection on =
the back of the case and the other arrow points to a common ground just =
floating around behind the instrument.&nbsp; For an experiment I slipped =
the ground wire connector over the threaded mouting stud of the case =
back and shoved the tach back into place temporarily to find out about =
the missing ground theory.&nbsp; It worked!&nbsp; You didn't think it =
was going to be that easy did you?&nbsp; The light had not illuminated =
the instrument before either, so after scraping and sanding the bulb =
hlder and the tube fitting on the back of the tach that the bulb shoves =
into, the light worked too, but wait there's more!&nbsp; After this =
hollow victory I had to use the horn on the test drive.&nbsp; Now the =
horn does not work, but when I push on the steering wheel stalk to =
activate the horn, the brake warning light comes on.&nbsp; I just love =
electrical problems.&nbsp; Not in my element here.&nbsp; Any ideas?<o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0cm =
0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D"">Mike MacLean<o:p class=3D""></o:p></div></div></div></div><div =
style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" =
class=3D"">_______________________________________________<br =
class=3D""><br class=3D""><a href=3D"mailto:[email-masked]" =
style=3D"color: purple; text-decoration: underline;" =
class=3D"">[email-masked]</a><br class=3D"">Donate: <a =
href=3D"http://www.team.net/donate.html" =
class=3D"">http://www.team.net/donate.html</a><br class=3D"">Suggested =
annual donation &nbsp;$12.75<br class=3D""><br class=3D"">Archive: <a =
href=3D"http://www.team.net/pipermail/mgs" =
class=3D"">http://www.team.net/pipermail/mgs</a> <a =
href=3D"http://autox.team.net/archive" =
class=3D"">http://autox.team.net/archive</a><br class=3D""><br =
class=3D"">Unsubscribe: <a =
href=3D"http://autox.team.net/mailman/options/mgs/[email-masked]" =
class=3D"">http://autox.team.net/mailman/options/mgs/[email-masked]</a><=
/div></div></blockquote></div></div></div></blockquote></div><br =
class=3D""></div></body></html>=

--Apple-Mail=_A38C9E92-2BA7-44A1-A35E-EA9852268605--

--===============3822158950739975954==
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

[email-masked]

--===============3822158950739975954==--

---

From: Michael MacLean via Mgs <[email-masked]>
Date: Thu, 16 Jan 2020 19:57:28 +0000 (UTC)

--===============8390685045472963806==
	boundary="----=_Part_48830_1951366994.1579204648102"

------=_Part_48830_1951366994.1579204648102
Content-Transfer-Encoding: quoted-printable

 Yes, I am sure it is a ground problem.=C2=A0 You are correct when you say =
the old connections probably are corroded to the point of very little elect=
rical connectivity.=C2=A0 They should be cleaned and re-connected.=C2=A0 Fo=
r now I just need the tach to work.=C2=A0 I am in the middle of an Austin H=
ealey BN2 restoration and do not have unlimited time to play around with th=
e MG yet.=C2=A0 A little at a time.=C2=A0 Today I am pulling the tachometer=
 and the speedometer out to send out to be rebuilt.=C2=A0 While they are ou=
t, I will have access to more of the wiring behind the dash.=C2=A0 It will =
be a chance to clean up some connections before they come back.=C2=A0 Today=
 I will disconnect the grounding wire eyelet I found behind the tach that I=
 slipped over the threaded post for the experiment.=C2=A0 We'll see if the =
horn comes back.=C2=A0 After that, we'll see why the cigar lighter does not=
 work.=C2=A0=C2=A0 I need a power point to charge my phone.Mike M

    On Thursday, January 16, 2020, 11:43:18 AM PST, Max Heim via Mgs <mgs@a=
utox.team.net> wrote: =20
=20
 I agree. That is something I did, too. Just thoroughly cleaning the contac=
ts makes a huge difference. And you will probably find that a lot of those =
old connectors will be cracked and aren=E2=80=99t really gripping.
--Max Heim'66 MGB

On Jan 16, 2020, at 11:40 AM, Hans Duinhoven <[email-masked]> wrote:
Looking to your picture, I think it is better to do a thorough wiring job.=
=C2=A0It looks, like the car has been exposed to =E2=80=9Cnature=E2=80=9D f=
or many times.=C2=A0This means, a lot of contacts are suspect of being poor=
 or bad.=C2=A0So besides true fault finding, I=E2=80=99d dismantle all wiri=
ng and get all contacts cleaned.Clean all bullet connectors and replace all=
 their interconnects.Clean all other connectors and replace these when they=
 are bad.I did this with my BGT in 1996 and after that job I never had any =
electrical failures, besides a faulty alternator (diode pack) and starter s=
olenoid, where the nut did not keep the 12 V wires fixed anymore.=C2=A0 =C2=
=A0So get a matching electrical diagram of the car=E2=80=99s built year.The=
 Haynes MGB manual always helped me out. =C2=A0Hope this helps for the long=
 term. =C2=A0Cheers,Hans=E2=80=9971 BGT =C2=A0Van:=C2=A0Mgs [mailto:mgs-bou=
[email-masked]]=C2=A0Namens=C2=A0Max Heim via Mgs
Verzonden:=C2=A0donderdag 16 januari 2020 20:20
Aan:=C2=A0Michael MacLean
CC:=C2=A0MGs
Onderwerp:=C2=A0Re: [Mgs] Electrical Nightmare =C2=A0I think you still have=
 a ground problem. Should the steering column have a separate ground wire o=
n a 69? I know there is one in the turn signal harness. =C2=A0It does help =
to consult the wiring diagram, to figure out where the common grounds are. =
=C2=A0 =C2=A0--Max Heim'66 MGB =C2=A0
On Jan 16, 2020, at 11:06 AM, Michael MacLean via Mgs <[email-masked]> =
wrote: =C2=A0In an earlier post I told how my tach in my 69 GT would die wh=
en the headlights were turned on.=C2=A0 Someone mentioned that the tach was=
 looking for a ground through the light wiring for the instrument.=C2=A0 Th=
at turned out to be true, somewhat.=C2=A0 To test this I pulled the instrum=
ent to inspect the wiring and found what you see in the picture.=C2=A0 One =
arrow points to the ground connection on the back of the case and the other=
 arrow points to a common ground just floating around behind the instrument=
.=C2=A0 For an experiment I slipped the ground wire connector over the thre=
aded mouting stud of the case back and shoved the tach back into place temp=
orarily to find out about the missing ground theory.=C2=A0 It worked!=C2=A0=
 You didn't think it was going to be that easy did you?=C2=A0 The light had=
 not illuminated the instrument before either, so after scraping and sandin=
g the bulb hlder and the tube fitting on the back of the tach that the bulb=
 shoves into, the light worked too, but wait there's more!=C2=A0 After this=
 hollow victory I had to use the horn on the test drive.=C2=A0 Now the horn=
 does not work, but when I push on the steering wheel stalk to activate the=
 horn, the brake warning light comes on.=C2=A0 I just love electrical probl=
ems.=C2=A0 Not in my element here.=C2=A0 Any ideas?Mike MacLean____________=
___________________________________

[email-masked]

Unsubscribe: http://autox.team.net/mailman/options/mgs/[email-masked]

[email-masked]

Unsubscribe: http://autox.team.net/mailman/options/mgs/rrengineer.mike@att.=
net
 =20
------=_Part_48830_1951366994.1579204648102
Content-Transfer-Encoding: quoted-printable

<html><head></head><body><div class=3D"ydpe93fbf76yahoo-style-wrap" style=
=3D"font-family:times new roman, new york, times, serif;font-size:16px;"><d=
iv></div>
        <div dir=3D"ltr" data-setdir=3D"false">Yes, I am sure it is a groun=
d problem.&nbsp; You are correct when you say the old connections probably =
are corroded to the point of very little electrical connectivity.&nbsp; The=
y should be cleaned and re-connected.&nbsp; For now I just need the tach to=
 work.&nbsp; I am in the middle of an Austin Healey BN2 restoration and do =
not have unlimited time to play around with the MG yet.&nbsp; A little at a=
 time.&nbsp; Today I am pulling the tachometer and the speedometer out to s=
end out to be rebuilt.&nbsp; While they are out, I will have access to more=
 of the wiring behind the dash.&nbsp; It will be a chance to clean up some =
connections before they come back.&nbsp; Today I will disconnect the ground=
ing wire eyelet I found behind the tach that I slipped over the threaded po=
st for the experiment.&nbsp; We'll see if the horn comes back.&nbsp; After =
that, we'll see why the cigar lighter does not work.&nbsp;&nbsp; I need a p=
ower point to charge my phone.</div><div dir=3D"ltr" data-setdir=3D"false">=
Mike M<br></div><div><br></div>
       =20
        </div><div id=3D"yahoo_quoted_9611417845" class=3D"yahoo_quoted">
            <div style=3D"font-family:'Helvetica Neue', Helvetica, Arial, s=
ans-serif;font-size:13px;color:#26282a;">
               =20
                <div>
                    On Thursday, January 16, 2020, 11:43:18 AM PST, Max Hei=
m via Mgs &lt;[email-masked]&gt; wrote:
                </div>
                <div><br></div>
                <div><br></div>
                <div><div id=3D"yiv4413153026"><div>I agree. That is someth=
ing I did, too. Just thoroughly cleaning the contacts makes a huge differen=
ce. And you will probably find that a lot of those old connectors will be c=
racked and aren=E2=80=99t really gripping.<div class=3D"yiv4413153026"><br =
class=3D"yiv4413153026" clear=3D"none"><div class=3D"yiv4413153026">
<div class=3D"yiv4413153026" style=3D"color:rgb(0, 0, 0);letter-spacing:nor=
mal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px=
;word-wrap:break-word;"><div class=3D"yiv4413153026" style=3D"color:rgb(0, =
0, 0);letter-spacing:normal;text-indent:0px;text-transform:none;white-space=
:normal;word-spacing:0px;word-wrap:break-word;"><div class=3D"yiv4413153026=
" style=3D"margin:0px;font-size:13px;">--</div><div class=3D"yiv4413153026"=
 style=3D"margin:0px;font-size:13px;min-height:16px;">Max Heim</div><div cl=
ass=3D"yiv4413153026" style=3D"margin:0px;font-size:13px;">'66 MGB</div></d=
iv></div>
</div>

<br class=3D"yiv4413153026" clear=3D"none"><div class=3D"yiv4413153026yqt41=
12021121" id=3D"yiv4413153026yqt16546"><div><blockquote class=3D"yiv4413153=
026" type=3D"cite"><div class=3D"yiv4413153026">On Jan 16, 2020, at 11:40 A=
M, Hans Duinhoven &lt;<a rel=3D"nofollow" shape=3D"rect" class=3D"yiv441315=
3026" ymailto=3D"mailto:[email-masked]" target=3D"_blank" href=3D"ma=
ilto:[email-masked]">[email-masked]</a>&gt; wrote:</div><br c=
lass=3D"yiv4413153026Apple-interchange-newline" clear=3D"none"><div class=
=3D"yiv4413153026"><div class=3D"yiv4413153026WordSection1" style=3D"font-f=
amily:Verdana;font-size:12px;font-style:normal;font-weight:normal;letter-sp=
acing:normal;text-indent:0px;text-transform:none;white-space:normal;word-sp=
acing:0px;"><div class=3D"yiv4413153026" style=3D"margin:0cm 0cm 0.0001pt;f=
ont-size:12pt;font-family:'Times New Roman', serif;"><span class=3D"yiv4413=
153026" style=3D"font-size:11pt;font-family:Calibri, sans-serif;color:rgb(3=
1, 73, 125);" lang=3D"EN-US">Looking to your picture, I think it is better =
to do a thorough wiring job.<span class=3D"yiv4413153026Apple-converted-spa=
ce">&nbsp;</span></span></div><div class=3D"yiv4413153026" style=3D"margin:=
0cm 0cm 0.0001pt;font-size:12pt;font-family:'Times New Roman', serif;"><spa=
n class=3D"yiv4413153026" style=3D"font-size:11pt;font-family:Calibri, sans=
-serif;color:rgb(31, 73, 125);" lang=3D"EN-US">It looks, like the car has b=
een exposed to =E2=80=9Cnature=E2=80=9D for many times.<span class=3D"yiv44=
13153026Apple-converted-space">&nbsp;</span></span></div><div class=3D"yiv4=
413153026" style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:'Tim=
es New Roman', serif;"><span class=3D"yiv4413153026" style=3D"font-size:11p=
t;font-family:Calibri, sans-serif;color:rgb(31, 73, 125);" lang=3D"EN-US">T=
his means, a lot of contacts are suspect of being poor or bad.<span class=
=3D"yiv4413153026Apple-converted-space">&nbsp;</span></span></div><div clas=
s=3D"yiv4413153026" style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-fa=
mily:'Times New Roman', serif;"><span class=3D"yiv4413153026" style=3D"font=
-size:11pt;font-family:Calibri, sans-serif;color:rgb(31, 73, 125);" lang=3D=
"EN-US">So besides true fault finding, I=E2=80=99d dismantle all wiring and=
 get all contacts cleaned.</span></div><div class=3D"yiv4413153026" style=
=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:'Times New Roman', s=
erif;"><span class=3D"yiv4413153026" style=3D"font-size:11pt;font-family:Ca=
libri, sans-serif;color:rgb(31, 73, 125);" lang=3D"EN-US">Clean all bullet =
connectors and replace all their interconnects.</span></div><div class=3D"y=
iv4413153026" style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:'=
Times New Roman', serif;"><span class=3D"yiv4413153026" style=3D"font-size:=
11pt;font-family:Calibri, sans-serif;color:rgb(31, 73, 125);" lang=3D"EN-US=
">Clean all other connectors and replace these when they are bad.</span></d=
iv><div class=3D"yiv4413153026" style=3D"margin:0cm 0cm 0.0001pt;font-size:=
12pt;font-family:'Times New Roman', serif;"><span class=3D"yiv4413153026" s=
tyle=3D"font-size:11pt;font-family:Calibri, sans-serif;color:rgb(31, 73, 12=
5);" lang=3D"EN-US">I did this with my BGT in 1996 and after that job I nev=
er had any electrical failures, besides a faulty alternator (diode pack) an=
d starter solenoid, where the nut did not keep the 12 V wires fixed anymore=
.<span class=3D"yiv4413153026Apple-converted-space">&nbsp;</span></span></d=
iv><div class=3D"yiv4413153026" style=3D"margin:0cm 0cm 0.0001pt;font-size:=
12pt;font-family:'Times New Roman', serif;"><span class=3D"yiv4413153026" s=
tyle=3D"font-size:11pt;font-family:Calibri, sans-serif;color:rgb(31, 73, 12=
5);" lang=3D"EN-US"> &nbsp;</span></div><div class=3D"yiv4413153026" style=
=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:'Times New Roman', s=
erif;"><span class=3D"yiv4413153026" style=3D"font-size:11pt;font-family:Ca=
libri, sans-serif;color:rgb(31, 73, 125);" lang=3D"EN-US">So get a matching=
 electrical diagram of the car=E2=80=99s built year.</span></div><div class=
=3D"yiv4413153026" style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-fam=
ily:'Times New Roman', serif;"><span class=3D"yiv4413153026" style=3D"font-=
size:11pt;font-family:Calibri, sans-serif;color:rgb(31, 73, 125);" lang=3D"=
EN-US">The Haynes MGB manual always helped me out.</span></div><div class=
=3D"yiv4413153026" style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-fam=
ily:'Times New Roman', serif;"><span class=3D"yiv4413153026" style=3D"font-=
size:11pt;font-family:Calibri, sans-serif;color:rgb(31, 73, 125);" lang=3D"=
EN-US"> &nbsp;</span></div><div class=3D"yiv4413153026" style=3D"margin:0cm=
 0cm 0.0001pt;font-size:12pt;font-family:'Times New Roman', serif;"><span c=
lass=3D"yiv4413153026" style=3D"font-size:11pt;font-family:Calibri, sans-se=
rif;color:rgb(31, 73, 125);" lang=3D"EN-US">Hope this helps for the long te=
rm.</span></div><div class=3D"yiv4413153026" style=3D"margin:0cm 0cm 0.0001=
pt;font-size:12pt;font-family:'Times New Roman', serif;"><span class=3D"yiv=
4413153026" style=3D"font-size:11pt;font-family:Calibri, sans-serif;color:r=
gb(31, 73, 125);" lang=3D"EN-US"> &nbsp;</span></div><div class=3D"yiv44131=
53026" style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:'Times N=
ew Roman', serif;"><span class=3D"yiv4413153026" style=3D"font-size:11pt;fo=
nt-family:Calibri, sans-serif;color:rgb(31, 73, 125);" lang=3D"EN-US">Cheer=
s,</span></div><div class=3D"yiv4413153026" style=3D"margin:0cm 0cm 0.0001p=
t;font-size:12pt;font-family:'Times New Roman', serif;"><span class=3D"yiv4=
413153026" style=3D"font-size:11pt;font-family:Calibri, sans-serif;color:rg=
b(31, 73, 125);" lang=3D"EN-US">Hans</span></div><div class=3D"yiv441315302=
6" style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:'Times New R=
oman', serif;"><span class=3D"yiv4413153026" style=3D"font-size:11pt;font-f=
amily:Calibri, sans-serif;color:rgb(31, 73, 125);" lang=3D"EN-US">=E2=80=99=
71 BGT</span></div><div class=3D"yiv4413153026" style=3D"margin:0cm 0cm 0.0=
001pt;font-size:12pt;font-family:'Times New Roman', serif;"><span class=3D"=
yiv4413153026" style=3D"font-size:11pt;font-family:Calibri, sans-serif;colo=
r:rgb(31, 73, 125);" lang=3D"EN-US"> &nbsp;</span></div><div class=3D"yiv44=
13153026"><div class=3D"yiv4413153026" style=3D"border-style:solid none non=
e;border-top-width:1pt;border-top-color:rgb(181, 196, 223);padding:3pt 0cm =
0cm;"><div class=3D"yiv4413153026" style=3D"margin:0cm 0cm 0.0001pt;font-si=
ze:12pt;font-family:'Times New Roman', serif;"><b class=3D"yiv4413153026"><=
span class=3D"yiv4413153026" style=3D"font-size:10pt;font-family:Tahoma, sa=
ns-serif;">Van:</span></b><span class=3D"yiv4413153026" style=3D"font-size:=
10pt;font-family:Tahoma, sans-serif;"><span class=3D"yiv4413153026Apple-con=
verted-space">&nbsp;</span>Mgs [<a rel=3D"nofollow" shape=3D"rect" class=3D=
"yiv4413153026" ymailto=3D"mailto:[email-masked]" target=3D"_bl=
ank" href=3D"mailto:[email-masked]">mailto:[email-masked]=
am.net</a>]<span class=3D"yiv4413153026Apple-converted-space">&nbsp;</span>=
<b class=3D"yiv4413153026">Namens<span class=3D"yiv4413153026Apple-converte=
d-space">&nbsp;</span></b>Max Heim via Mgs<br class=3D"yiv4413153026" clear=
=3D"none"><b class=3D"yiv4413153026">Verzonden:</b><span class=3D"yiv441315=
3026Apple-converted-space">&nbsp;</span>donderdag 16 januari 2020 20:20<br =
class=3D"yiv4413153026" clear=3D"none"><b class=3D"yiv4413153026">Aan:</b><=
span class=3D"yiv4413153026Apple-converted-space">&nbsp;</span>Michael MacL=
ean<br class=3D"yiv4413153026" clear=3D"none"><b class=3D"yiv4413153026">CC=
:</b><span class=3D"yiv4413153026Apple-converted-space">&nbsp;</span>MGs<br=
 class=3D"yiv4413153026" clear=3D"none"><b class=3D"yiv4413153026">Onderwer=
p:</b><span class=3D"yiv4413153026Apple-converted-space">&nbsp;</span>Re: [=
Mgs] Electrical Nightmare</span></div></div></div><div class=3D"yiv44131530=
26" style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:'Times New =
Roman', serif;"> &nbsp;</div><div class=3D"yiv4413153026" style=3D"margin:0=
cm 0cm 0.0001pt;font-size:12pt;font-family:'Times New Roman', serif;">I thi=
nk you still have a ground problem. Should the steering column have a separ=
ate ground wire on a 69? I know there is one in the turn signal harness.</d=
iv><div class=3D"yiv4413153026"><div class=3D"yiv4413153026" style=3D"margi=
n:0cm 0cm 0.0001pt;font-size:12pt;font-family:'Times New Roman', serif;"> &=
nbsp;</div></div><div class=3D"yiv4413153026"><div class=3D"yiv4413153026" =
style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:'Times New Roma=
n', serif;">It does help to consult the wiring diagram, to figure out where=
 the common grounds are.</div></div><div class=3D"yiv4413153026"><div class=
=3D"yiv4413153026" style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-fam=
ily:'Times New Roman', serif;"> &nbsp;</div></div><div class=3D"yiv44131530=
26"><div class=3D"yiv4413153026" style=3D"margin:0cm 0cm 0.0001pt;font-size=
:12pt;font-family:'Times New Roman', serif;"> &nbsp;</div></div><div class=
=3D"yiv4413153026"><div class=3D"yiv4413153026"><div class=3D"yiv4413153026=
"><div class=3D"yiv4413153026"><div class=3D"yiv4413153026" style=3D"margin=
:0cm 0cm 0.0001pt;font-size:12pt;font-family:'Times New Roman', serif;"><sp=
an class=3D"yiv4413153026" style=3D"font-size:10pt;">--</span></div></div><=
div class=3D"yiv4413153026"><div class=3D"yiv4413153026" style=3D"margin:0c=
m 0cm 0.0001pt;font-size:12pt;font-family:'Times New Roman', serif;"><span =
class=3D"yiv4413153026" style=3D"font-size:10pt;">Max Heim</span></div></di=
v><div class=3D"yiv4413153026"><div class=3D"yiv4413153026" style=3D"margin=
:0cm 0cm 0.0001pt;font-size:12pt;font-family:'Times New Roman', serif;"><sp=
an class=3D"yiv4413153026" style=3D"font-size:10pt;">'66 MGB</span></div></=
div></div></div></div><div class=3D"yiv4413153026" style=3D"margin:0cm 0cm =
0.0001pt;font-size:12pt;font-family:'Times New Roman', serif;"> &nbsp;</div=
><div class=3D"yiv4413153026"><blockquote class=3D"yiv4413153026" style=3D"=
margin-top:5pt;margin-bottom:5pt;" type=3D"cite"><div class=3D"yiv441315302=
6"><div class=3D"yiv4413153026" style=3D"margin:0cm 0cm 0.0001pt;font-size:=
12pt;font-family:'Times New Roman', serif;">On Jan 16, 2020, at 11:06 AM, M=
ichael MacLean via Mgs &lt;<a rel=3D"nofollow" shape=3D"rect" class=3D"yiv4=
413153026" ymailto=3D"mailto:[email-masked]" target=3D"_blank" href=3D"=
mailto:[email-masked]" style=3D"color:purple;text-decoration:underline;=
">[email-masked]</a>&gt; wrote:</div></div><div class=3D"yiv4413153026"=
 style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:'Times New Rom=
an', serif;"> &nbsp;</div><div class=3D"yiv4413153026"><div class=3D"yiv441=
3153026"><div class=3D"yiv4413153026"><div class=3D"yiv4413153026"><div cla=
ss=3D"yiv4413153026" style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-f=
amily:'Times New Roman', serif;">In an earlier post I told how my tach in m=
y 69 GT would die when the headlights were turned on.&nbsp; Someone mention=
ed that the tach was looking for a ground through the light wiring for the =
instrument.&nbsp; That turned out to be true, somewhat.&nbsp; To test this =
I pulled the instrument to inspect the wiring and found what you see in the=
 picture.&nbsp; One arrow points to the ground connection on the back of th=
e case and the other arrow points to a common ground just floating around b=
ehind the instrument.&nbsp; For an experiment I slipped the ground wire con=
nector over the threaded mouting stud of the case back and shoved the tach =
back into place temporarily to find out about the missing ground theory.&nb=
sp; It worked!&nbsp; You didn't think it was going to be that easy did you?=
&nbsp; The light had not illuminated the instrument before either, so after=
 scraping and sanding the bulb hlder and the tube fitting on the back of th=
e tach that the bulb shoves into, the light worked too, but wait there's mo=
re!&nbsp; After this hollow victory I had to use the horn on the test drive=
.&nbsp; Now the horn does not work, but when I push on the steering wheel s=
talk to activate the horn, the brake warning light comes on.&nbsp; I just l=
ove electrical problems.&nbsp; Not in my element here.&nbsp; Any ideas?</di=
v></div><div class=3D"yiv4413153026"><div class=3D"yiv4413153026" style=3D"=
margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:'Times New Roman', serif=
;">Mike MacLean</div></div></div></div><div class=3D"yiv4413153026" style=
=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:'Times New Roman', s=
erif;">_______________________________________________<br class=3D"yiv44131=
53026" clear=3D"none"><br class=3D"yiv4413153026" clear=3D"none"><a rel=3D"=
nofollow" shape=3D"rect" class=3D"yiv4413153026" ymailto=3D"mailto:Mgs@auto=
x.team.net" target=3D"_blank" href=3D"mailto:[email-masked]" style=3D"c=
olor:purple;text-decoration:underline;">[email-masked]</a><br class=3D"=
yiv4413153026" clear=3D"none">Donate: <a rel=3D"nofollow" shape=3D"rect" cl=
ass=3D"yiv4413153026" target=3D"_blank" href=3D"http://www.team.net/donate.=
html">http://www.team.net/donate.html</a><br class=3D"yiv4413153026" clear=
=3D"none">Suggested annual donation &nbsp;$12.75<br class=3D"yiv4413153026"=
 clear=3D"none"><br class=3D"yiv4413153026" clear=3D"none">Archive: <a rel=
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net</a></div></div></blockquote></div></div></div></blockquote></div></div>=
<br class=3D"yiv4413153026" clear=3D"none"></div></div></div><div class=3D"=
yqt4112021121" id=3D"yqt64846">____________________________________________=
___<br clear=3D"none"><br clear=3D"none"><a shape=3D"rect" ymailto=3D"mailt=
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[email-masked]

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---

From: PaulHunt73 via Mgs <[email-masked]>
Date: Fri, 17 Jan 2020 10:34:42 -0000 P5VCbRIrGtgr3YZVovaehXdJrAxO9xUHnMUKXSmjN+cWWUCxBVW0trugk8ey6Uo68qRptxR+y9/+eNIyUUlV7um1Xp0qLQ9igb0=

This is a multi-part message in MIME format.

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I have to say that's exactly what I expected for the tach.

Whilst the other could be an earth problem, it could also be a 12v =
supply problem.  But there are reasons I won't go into that make a =
single fault in either of those an unlikely cause, more likely that =
there are two related problems.

The easiest thing is to diagnose the horn circuit, and see where that =
takes you.  At the horn terminals you should see 12v on both the purple =
and purple terminals of the horn, leave all wiring connected to their =
terminals.  When the horn button is pressed, on a working circuit, the =
purple terminal will stay at 12v whereas the purple/black terminal will =
drop to zero volts. =20

With a non-working horn if the purple drops to zero then the problem =
lies back towards the fusebox, bad connections at the fuses and the =
spades are not uncommon.

But if both terminals stay at 12v then the problem lies back towards the =
horn button.

PaulH.

  ----- Original Message -----=20

  ...
  After this hollow victory I had to use the horn on the test drive.  =
Now the horn does not work, but when I push on the steering wheel stalk =
to activate the horn, the brake warning light comes on.  I just love =
electrical problems.  Not in my element here.  Any ideas?
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=EF=BB=BF<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META content=3D"text/html; charset=3Dutf-8" http-equiv=3DContent-Type>
<META name=3DGENERATOR content=3D"MSHTML 8.00.6001.23588">
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT size=3D2>I have to say that's exactly what I expected for the =

tach.</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>Whilst the other could be an earth problem,&nbsp;it =
could also=20
be a 12v supply problem.&nbsp; But there are reasons I won't go into =
that make a=20
single fault in&nbsp;either of&nbsp;those an unlikely cause, more likely =
that=20
there are two related problems.</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>The easiest thing is to diagnose the horn circuit, =
and see=20
where that takes you.&nbsp; At the horn terminals you should&nbsp;see =
12v on=20
both the purple and purple terminals of the horn, leave all wiring =
connected to=20
their terminals.&nbsp; When the horn button is pressed, on a working =
circuit,=20
the purple terminal will stay at 12v whereas the purple/black terminal =
will drop=20
to zero volts.&nbsp; </FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>With a non-working horn if the purple drops to zero =
then the=20
problem lies back towards the fusebox,&nbsp;bad connections at the fuses =
and the=20
spades are not uncommon.</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>But if both terminals stay at 12v then the problem =
lies back=20
towards the horn button.</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>PaulH.</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; =
PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
  <DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
  <DIV=20
  style=3D"FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: =
black"><B></B>&nbsp;</DIV>
  <DIV=20
  style=3D"FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: =
black"><STRONG>...</STRONG></DIV>
  <DIV=20
  style=3D"FONT-FAMILY: times new roman, new york, times, serif; =
FONT-SIZE: 16px"=20
  class=3Dyahoo-style-wrap>
  <DIV dir=3Dltr data-setdir=3D"false">After this hollow victory I had =
to use the=20
  horn on the test drive.&nbsp; Now the horn does not work, but when I =
push on=20
  the steering wheel stalk to activate the horn, the brake warning light =
comes=20
  on.&nbsp; I just love electrical problems.&nbsp; Not in my element =
here.&nbsp;=20
  Any ideas?</DIV></DIV></BLOCKQUOTE></BODY></HTML>

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[email-masked]

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