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And the excellent wiring diagram linked to shows that the oil pressure
warning switch works just as you describe - not grounded when sufficient
pressure is there, grounded otherwise. If you have sufficient pressure,
I believe you've correctly diagnosed the situation. Either the switch
is bad, or when you unscrew it you'll find the passage to it plugged.Â
Most likely the switch.
Cheers, Tony
On 8/9/2021 6:57 PM, Alex & Janet Thomson wrote:
>
> Check out the appropriate wiring diagram shown here. Itâ??s a good place
> to start.
>
> http://www.advanceautowire.com/tr2506.pdf
> <http://www.advanceautowire.com/tr2506.pdf>
>
> Alex Thomson
>
> TR6
>
> GT6
>
> *From:*Triumphs [mailto:triumphs-bounces@autox.team.net] *On Behalf Of
> *davgil@aol.com
> *Sent:* Sunday, August 08, 2021 6:16 PM
> *To:* triumphs@autox.team.net
> *Subject:* [TR] Oil pressure sending switch
>
> Wanted to validate my understanding of the low oil pressure sending
> switch on a 1976 TR6. I noted that a wire was not hooked up and when
> I hooked it up, the oil pressure warning light came on and stayed on
> when the car was cranked. In the 25 years I have owned this vehicle,
> I have never seen the low oil pressure light on so didn't realize that
> there was a problem. I put a meter from the switch to the positive
> battery terminal. When I crank the car, there is 13.7 volts,
> regardless of the oil pressure. My sense is that the switch should
> only ground under very low oil pressure, and that when suitable
> pressure is achieved, the ground is disconnected. My assumption is
> that there is an internal short in the switch which is keeping the
> ground connected regardless of oil pressure. Would this be a correct
> assumption, or is there another issue?
>
> David Gill
>
> 1976 TR6
>
>
> ** triumphs@autox.team.net **
>
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/pipermail/triumphs http://www.team.net/archive
>
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/triumphs/tony@tonydrews.com
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<p>And the excellent wiring diagram linked to shows that the oil
pressure warning switch works just as you describe - not grounded
when sufficient pressure is there, grounded otherwise. If you
have sufficient pressure, I believe you've correctly diagnosed the
situation. Either the switch is bad, or when you unscrew it
you'll find the passage to it plugged. Most likely the switch.</p>
<p>Cheers, Tony<br>
</p>
<div class="moz-cite-prefix">On 8/9/2021 6:57 PM, Alex & Janet
Thomson wrote:<br>
</div>
<blockquote type="cite"
cite="mid:008701d78d7a$516ca480$f445ed80$@charter.net">
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<div class="WordSection1">
<p class="MsoNormal"><span
style="font-family:"Calibri","sans-serif";color:#1F497D">Check
out the appropriate wiring diagram shown here. Itâ??s a good
place to start.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Calibri","sans-serif";color:#1F497D"><o:p>Â </o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Calibri","sans-serif";color:#1F497D"><a
href="http://www.advanceautowire.com/tr2506.pdf";
moz-do-not-send="true">http://www.advanceautowire.com/tr2506.pdf</a><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Calibri","sans-serif";color:#1F497D"><o:p>Â </o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Calibri","sans-serif";color:#1F497D">Alex
Thomson<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Calibri","sans-serif";color:#1F497D">TR6<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Calibri","sans-serif";color:#1F497D">GT6<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Calibri","sans-serif";color:#1F497D"><o:p>Â </o:p></span></p>
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
Triumphs [<a class="moz-txt-link-freetext"
href="mailto:triumphs-bounces@autox.team.net";>mailto:triumphs-bounces@autox.team.net</a>]
<b>On
Behalf Of </b><a class="moz-txt-link-abbreviated"
href="mailto:davgil@aol.com";>davgil@aol.com</a><br>
<b>Sent:</b> Sunday, August 08, 2021 6:16 PM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated"
href="mailto:triumphs@autox.team.net";>triumphs@autox.team.net</a><br>
<b>Subject:</b> [TR] Oil pressure sending
switch<o:p></o:p></span></p>
<p class="MsoNormal"><o:p>Â </o:p></p>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">Wanted
to validate my understanding of the low oil pressure
sending switch on a 1976 TR6. I noted that a wire was not
hooked up and when I hooked it up, the oil pressure
warning light came on and stayed on when the car was
cranked. In the 25 years I have owned this vehicle, I
have never seen the low oil pressure light on so didn't
realize that there was a problem. I put a meter from the
switch to the positive battery terminal. When I crank the
car, there is 13.7 volts, regardless of the oil pressure.Â
My sense is that the switch should only ground under very
low oil pressure, and that when suitable pressure is
achieved, the ground is disconnected. My assumption is
that there is an internal short in the switch which is
keeping the ground connected regardless of oil pressure.Â
Would this be a correct assumption, or is there another
issue?  <o:p></o:p></span></p>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">David
Gill<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">1976
TR6<o:p></o:p></span></p>
</div>
</div>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<pre class="moz-quote-pre" wrap="">** <a class="moz-txt-link-abbreviated"
href="mailto:triumphs@autox.team.net";>triumphs@autox.team.net</a> **
Archive: <a class="moz-txt-link-freetext"
href="http://www.team.net/pipermail/triumphs";>http://www.team.net/pipermail/triumphs</a>
<a class="moz-txt-link-freetext"
href="http://www.team.net/archive";>http://www.team.net/archive</a>
</pre>
</blockquote>
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