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Oil pressure sensor wiring
Posted by: mashad11 ()
Date: January 08, 2021 02:54PM

This is probably a simple question and I am learning as I go.

As you can see in the picture, I have a single wire coming out of the oil pressure sensor going to a harness. The harness has two male connectors. One of them is not connected to anything (with a green cable).

Question 1 - What is it supposed to connect to?
Question 2 - There is a loose brown cable with what looks like a ground connector. Is that a ground connector or something else?

I bought a replacement oil pressure/temp switch cable that has 3 connectors. I assume one end goes to the oil pressure sensor and the other two ends go to the harness, but I want to ask first and then connect it.

I also want to thank everyone on the forum for answering easy and complex questions!

Ali S
'65 Coupe - 140 - 4 Speed
Los Angeles

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Re: Oil pressure sensor wiring
Posted by: RobertC ()
Date: January 08, 2021 03:07PM

You bought the wrong sender - unless you have an electric fuel pump and are wiring a "kill" switch based on oil pressure.

You need the oil pressure switch that you have in your picture. Only one wire in stock wiring.

Memory is fading, but I think that the second wire goes to a head temp switch (supporing an idiot light) in the passenger side head.

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Re: Oil pressure sensor wiring
Posted by: steve c goodman ()
Date: January 08, 2021 03:25PM

The 2 prong plug was used on CORSA models. The reason for the split of the two wires was the use of the overheat buzzer. Wires needed to be separate so oil pressure switch would not activate buzzer.

best wishes, Steve
Rear Engine Spec. Inc. Golden, Colo.

1962 spyder 3.0L turbo---1965 Crown V8
1967 monza 110/4---1968 monza 110/4
1971 amante gt 110/4
CORSA/RMC/PPCC/V8 Registry

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Re: Oil pressure sensor wiring
Posted by: Marco_a_p ()
Date: January 08, 2021 04:00PM

Brown wire is Tach lead that attaches to negative side of coil...

Marco
A 2nd Gen Monza Wagon, a 2nd Gen GB 8door, a 2nd Gen (61's were 1st Gen) R/s and a 62nd Gen Turbo coupe..

Hanging out with the scorpions, king snakes, road runners, coyotes and quails In the southern desert of the silver state
Mesquite NV 89024

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Re: Oil pressure sensor wiring
Posted by: steve c goodman ()
Date: January 08, 2021 04:06PM

Thank you Marco I didn't go far enough down the page to see that question.

best wishes, Steve
Rear Engine Spec. Inc. Golden, Colo.

1962 spyder 3.0L turbo---1965 Crown V8
1967 monza 110/4---1968 monza 110/4
1971 amante gt 110/4
CORSA/RMC/PPCC/V8 Registry

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Re: Oil pressure sensor wiring
Posted by: RobertC ()
Date: January 08, 2021 04:17PM

Good thing I did not get further into this.

I thought it was a Monza based on his signature.

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Re: Oil pressure sensor wiring
Posted by: JimBrandberg ()
Date: January 09, 2021 04:34AM

O'Reilly's has Standard PS-15 for $7 lately. It even has some red sealer on the threads.
I've been meaning to check as 15 seems a little high, I was thinking 6 but that seems low.

Jim Brandberg
Isanti, MN
CorvairRepair.com



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Re: Oil pressure sensor wiring
Posted by: vairmech ()
Date: January 09, 2021 05:04AM

The one thing not answered was about the wire harness purchased.

The Corsa harness has the three connectors like you mentioned but has 2 separate wires going into a dual connector like is shown in your picture where you have the single going in.
The oil pressure switch will connect into the slot that corresponds with where the single is now plugged in and the other separate wire comes from the head over heat switch and plugs into the other cavity. With the correct harness you will not have to worry about this as the harness comes with a dual plug that just slides into the one on your car.

If you get the correct harness that goes to the switches the long one will go to the oil pressure switch and the short one will go to the head overheat switch.

BTW, you will also want to get the rubber grommet where the head over heat wire goes through the sheet metal, it is a pain to put in while on the engine but it is needed so the wire doesn't chafe and give you a false overheat indication.

Ken Hand
Handy Car Care
248 613 8586

Vairmech@aol.com

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