Re: 67-72 Chevy Truck fuel gauge diagnostics 101
Next, I will show the ohm meter readings for the fuel gauge and the fuel tank sending unit. The sending unit is not from a 67-72 truck but it is a 0 - 90 OHM scale and will be the same as the truck except the float arm is shorter.
As you can see, I have hooked up the ohm meter to the fuel gauge in several different ways so you can see the meter reading differences. I always test with the resistor installed and tight on the gauge as it would be in a normal situation.
I will repeat this on the fuel sending unit so you can see the reading changes depending on the float level.
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