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Ron,
I believe the diode should be installed the other way. The way you have
described it, it will conduct positive straight to ground.
Jim
>
> ------------------------------
>
>
> From: ronald.olds@mchsi.com
> To: keithstewart@bell.net
> Cc: triumphs@autox.team.net
> Subject: Re: [TR] Electric Fan Relay
> Message-ID:
> <806236043.1685117.1655398950108.JavaMail.zimbra@mchsi.com>
> Content-Type: text/plain; charset="utf-8"
>
> Keith,
>
> I would recommend connecting a 1N4004 diode across the positive an the
> ground terminals of the relay coil. Connect the cathode end of the diode to
> the positive terminal and the anode end (the end of the diode with the line
> om it) to the negative terminal. this will have no effect when the relay is
> energized. When a relay is denergized it generates a spark which can burn
> the points. The diode will allow this spark to travel through the diode and
> dissipate.
> Connect to relay negative connection. Connect to the relay positive
> terminal.
>
> Diodes should be across the terminals of all relays and solenoids.
>
> Ronald Olds
>
>
> From: keithstewart@bell.net
> To: triumphs@autox.team.net
> Sent: Thursday, June 16, 2022 11:38:04 AM
> Subject: [TR] Electric Fan Relay
>
> I have a 62 TR4 with Trim Line electric fan, Derale fan controller, 30 amp
> fuse, and 30 amp NAPA relay. In the past 5 or 6 years, I have likely
> replaced the relay six or seven times. The wiring seems pretty straight
> forward and all seems in order. I really have no idea where to look next.
> Any suggestions?
>
> Keith Stewart
>
> keithstewart@bell.net
>
--0000000000002389a805e1966fb0
Content-Transfer-Encoding: quoted-printable
<div dir=3D"auto"><div class=3D"gmail_quote" dir=3D"auto"><div dir=3D"ltr" =
class=3D"gmail_attr">=C2=A0Ron,</div><div dir=3D"ltr" class=3D"gmail_attr">=
I believe the diode should be installed the other way. The way you have des=
cribed it, it will conduct positive straight to ground.</div><div dir=3D"lt=
r" class=3D"gmail_attr">Jim</div><blockquote class=3D"gmail_quote" style=3D=
"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
------------------------------<br>
<br><br>
From: <a href=3D"mailto:ronald.olds@mchsi.com"; target=3D"_blank" rel=3D"nor=
eferrer">ronald.olds@mchsi.com</a><br>
To: <a href=3D"mailto:keithstewart@bell.net"; target=3D"_blank" rel=3D"noref=
errer">keithstewart@bell.net</a><br>
Cc: <a href=3D"mailto:triumphs@autox.team.net"; target=3D"_blank" rel=3D"nor=
eferrer">triumphs@autox.team.net</a><br>
Subject: Re: [TR] Electric Fan Relay<br>
Message-ID:<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 <<a href=3D"mailto:806236043.1685117.1655398=
950108.JavaMail.zimbra@mchsi.com" target=3D"_blank" rel=3D"noreferrer">8062=
36043.1685117.1655398950108.JavaMail.zimbra@mchsi.com</a>><br>
<br>
Keith, <br>
<br>
I would recommend connecting a 1N4004 diode across the positive an the grou=
nd terminals of the relay coil. Connect the cathode end of the diode to the=
positive terminal and the anode end (the end of the diode with the line om=
it) to the negative terminal. this will have no effect when the relay is e=
nergized. When a relay is denergized it generates a spark which can burn th=
e points. The diode will allow this spark to travel through the diode and d=
issipate. <br>
Connect to relay negative connection. Connect to the relay positive termina=
l. <br>
<br>
Diodes should be across the terminals of all relays and solenoids. <br>
<br>
Ronald Olds <br>
<br>
<br>
From: <a href=3D"mailto:keithstewart@bell.net"; target=3D"_blank" rel=3D"nor=
eferrer">keithstewart@bell.net</a> <br>
To: <a href=3D"mailto:triumphs@autox.team.net"; target=3D"_blank" rel=3D"nor=
eferrer">triumphs@autox.team.net</a> <br>
Sent: Thursday, June 16, 2022 11:38:04 AM <br>
Subject: [TR] Electric Fan Relay <br>
<br>
I have a 62 TR4 with Trim Line electric fan, Derale fan controller, 30 amp =
fuse, and 30 amp NAPA relay. In the past 5 or 6 years, I have likely replac=
ed the relay six or seven times. The wiring seems pretty straight forward a=
nd all seems in order. I really have no idea where to look next. Any sugges=
tions?<br>
<br>
Keith Stewart <br>
<br>
<a href=3D"mailto:keithstewart@bell.net"; target=3D"_blank" rel=3D"noreferre=
r">keithstewart@bell.net</a><br>
</blockquote></div></div>
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