Testing Oil Pressure Sender

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Oct 25, 2006 | 06:53 PM

79vetter

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Drifting

Joined: Feb 2005

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From: Richardson Tx.

Testing Oil Pressure Sender

My OP gauge works but is registering too low (verified with mechanical gauge).
I want to be able to test the resistance of the sending unit properly but am not getting a reading with the voltmeter

thanks

Last edited by 79vetter; Oct 26, 2006 at 08:41 PM.

Oct 25, 2006 | 07:28 PM

BobzVette

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From: Hot AZ

Your using the wrong meter, you want to test the resistance to ground. The sender does not generate electric current. The higher the pressure the greater the resistance. If you ground the oil pressure sender wire your guage needle should go to zero. Good luck.

Oct 26, 2006 | 05:40 PM

79vetter

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Drifting

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From: Richardson Tx.

Thanks- I checked Resistance at the wiring harness for the gauges and it fluctuates as I rev it up.
This leaves either my gauge or PCB as the reason why I don't register enough Oil pressure. Anyone have some input on this one?
thanks

Oct 26, 2006 | 08:29 PM

79vetter

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Drifting

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From: Richardson Tx.

Ok, let me ask this: What should the resistance be coming out of the sending unit if I have around 55PSI at startup..

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