[TR] Oil pressure sending switch

[Tony Drews]

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.

Cheers, Tony

On 8/9/2021 6:57 PM, Alex & Janet Thomson wrote:
>
> Check out the appropriate wiring diagram shown here. It’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 at autox.team.net] *On Behalf Of 
> *davgil at aol.com
> *Sent:* Sunday, August 08, 2021 6:16 PM
> *To:* triumphs at 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 at autox.team.net **
>
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