[dave`12]

Hello. I have a 67 c10. All the gauges work fine except the fuel gauge. I checked, and the wire from the sending unit has continuity. Also checked the power from the harness (have a wiring diagram) that goes into the cluster that feeds power, it's good. Gauge reads empty.

Can anyone tell me how to test the sender? I had it out of the tank when I removed the tank to drain old bad gas. Perhaps I messed it up when I removed or reinstalled it.

Also is it safe to run power directly to the gauge, I'm afraid I might cook it running 12v.

Or does it run by completing a ground circuit?

The printed circuit was replaced when I refurbished the cluster, just about sure it is good.

Any help appreciated.