Gas Gauge
 

I have a 62 c-10 with the original fuel tank and sender, but after market gauge. The gauge is an equus gm 0- 90 ohm, when the tank is full the gauge only goes as far as one quarter. I was told I could put a resister in the line to correct this problem, but do not what resister to use. Can someone help me?

Re: Gas Gauge
 

Your original sending unit is 0Ω (empty) to 30Ω (full). Unfortunately, there is no way you can simply add a fixed value resistor to the circuit and have the 0 - 90Ω gauge give you correct readings at all fuel levels.

I don't think there are any 0 - 90Ω sending units out there that will fit the stock fuel tanks in these trucks. There might be a universal sending unit that could be adapted. But the easiest fix will probably be to buy another gauge that is designed to work with the 0 - 30Ω sending unit.

Re: Gas Gauge
 

changing the fuel sender might be a better solution. Adding a resister would only shift the reading up the scale

Re: Gas Gauge