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Wiring Issue (buzzing?)

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SkURTnDSM92T

15+ Year Contributor
122
2
Aug 16, 2006
Cincinnati, Ohio
I thought I had a pretty good grasp of wiring, but for some reason I am having a problem.

I was putting some new gauges in (UEGO, Oil Press, Water Temp). I wired the UEGO seperately, red to an open spot in the kick panel, and grounded it. It works fine from what I can gather.

I then wired the two other gauges for illumination, Autometer white wire to green/white wire on the hazard light harness I believe, and Autometer black wire to black/yellow wire on the same harness. The illumination for gauges works correctly with the dimmer switch.

However, after grounding the actual gauges themselves, everytime I apply current to the gauge through a power source, the gauges spike to as far to the right as they can go, and then I hear a loud buzzing coming from somewhere near the ECU.

What the heck is this?
 
The red wire of the UEGO harness goes to a spot on the kickpanel that is not being used..

This has nothing to do with the problem however..
 
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