electric gauge wiring

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Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=98608
Printed Date: April 28, 2024 at 11:11 AM

Topic: electric gauge wiring

Posted By: Zilverado
Subject: electric gauge wiring
Date Posted: November 04, 2007 at 9:02 AM

I am trying to intall an after-market oil pressure gause to replace the "idiot light" on my dash. The electric gauge I purchased has a sending unit with two signal wire pins, and came with two connectors. The gauge itself only has one signal "in" wire. If I hook up the gauge, I get two totally different reading from the different pins - neither seems totally correct. The instructions with the gauge are useless (only show one pin).

Should both pins be hooked up at the same time - and to the same signal "in" wire?

Any thoughts?

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Zilverado,
Backyard Mechanic
1986 Chevy Truck & 1992 Nissan Pathfinder

Replies:

Posted By: i am an idiot
Date Posted: November 09, 2007 at 4:45 AM

One lead from the sensor needs to go to the Gauge and the other lead needs to be grounded.

Posted By: Zilverado
Date Posted: November 09, 2007 at 3:18 PM

Thanks for the reply.

Grounding the second terminal is one thing I have not tried. I thought it just grounded through the actual sending unit-to-engine block threaded fitting. When I did a continuity test (prior to installation) between the threaded fitting and the terminals, both made the tester light up - so both terminals are at least somewhat grounded through the block (I don't know?), but maybe the resistance is different.

Either way, I'll connect the second terminal to a good ground and see waht happens.

Thanks again - Z.

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Zilverado,
Backyard Mechanic
1986 Chevy Truck & 1992 Nissan Pathfinder