Re: Default 68 camaro gas gauge not reading correctly
Got an ohmmeter/DMM? There is a tan wire from the driver kick panel to the rear of the car by the fuel filler tube, may have to remove the shield. This tan wire goes to the sending unit.
Unhook the tan wire and measure ohms to ground. GM is 90 ohms = full; 0 ohms = empty.
There is a black wire coming off the sending unit and goes to the tank strap mounting on the pass side, make sure this connection is good condition, wire brush it.
If you ground the tan wire, gauge should read empty. Tan wire back to full tank sending unit, gauge should indicate full. If the needle arc is present between full to empty, then needle may need relocating by moving it on its shaft.
To check further levels, you're either going to have to drive it, siphon gas out yo empty the tank, or get a 45 ohm resistor to check for 1/2 tank by tying one lead to ground and the other lead to the tan wire.
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