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Pyrometer Jumping?

9934 Views 10 Replies 7 Participants Last post by  Blackcloud2k
Hey I got a question, I helped a buddy install his gauges on Thursday. Today his pyrometer needle started jumping around, back and forth.

Is that a ground issue? Or something else? I'm just trying track down the problem before I tear into it to fix it.
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Thanks guys, I'll check it out tommorrow afternoon. The power wire runs directly from the fuse panel below the steering wheel to the gauge in the a-pillar.

He said it's only done it once, so I'm concerned I can't get it to do it again. I'm going to move the ground and see what happens. If the pyro works right after that, I guess that was it.

If it still bounces around I'll check into the gauge being faulty...

Thanks for the input...

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Just out of curiosity does he have a CB radio in his truck? My optix pyro jumps around when I key up the mic, and I cant figure out why it does this since the power and the ground wires for the cb and the guage go to completly different power and grounds.
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