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58 chevy truck amp gauge wiring help needed
I've got the entire gauge cluster out of my '58 chevy stepside & just installed a new fuel gauge.
When I removed the 2 wires on back of the amp gauge, they weren't marked.
I connected power back to the battery, checked each wire, & both have constant 12 v. to ground.
I called the shop that rebuilt my speedometer couple yrs ago, he told me only one should be constant hot, 2nd wire should be load going to lights etc.
Running a 77 350 engine, & complete drive train is from a 77 malibu.
Can't recall ever seeing the gauge needle reading wrong when it was hooked up.
Need some advise.
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