TR4/4A oil pressure switch question

[JimTR4]

Hi all,
I have a new oil pressure switch. It has 2 prongs/spade type connectors. I am only familiar with single prong types. All I want to do is use it to illuminate a low oil pressure light.
How do I go about wiring this up?
Thanks.

 

[Andrew Mace]

Never saw one with two prongs (one- and three-prong, yes. Two-prong, no). Did you get a brake light switch by mistake?

 

[JimTR4]

Maybe although it was ordered as an oil pressure switch...it has 2 prongs and 1 screw between the prongs. I'll try to get a pic later.

 

[poolboy]

Since it acts as a ground, it wouldn't hurt to put it in place and see how it works.
It either has 2 spades for grounding 2 circuits when there is no oil pressure or one of the spades is for creating an external ground for the other spade when there is no oil pressure similar to the externally grounded 3 spade TR6 oil pressure switch.

 

[Geo Hahn]

Since it acts as a ground, it wouldn't hurt to put it in place and see how it works...

Or for an off-the-engine test - you could offer air pressure to it and see how it behaves (using an ohmmeter to check continuity between switch body & each terminal, then between the terminals themselves).

 

[JimTR4]

Thanks guys - I'll test it out.

 

[JerryVV]

I guess it begs the question, where are you using the switch if on a TR4 as your name and photo implies you have a TR4. Never saw an electric oil pressure switch on a TR4. At what low pressure (pounds) will it alert.

 

[JimTR4]

Supposedly at 20 PSI.
It fits into an adapter that them goes into an oil gallery screw "hole".

I guess it begs the question, where are you using the switch if on a TR4 as your name and photo implies you have a TR4. Never saw an electric oil pressure switch on a TR4. At what low pressure (pounds) will it alert.