Re: 68 fuel gauge behavior
The needle might go the normal positon. But every Camaro I've had, the needle would register the level its at, no overshoot, and needle is pretty damped, meaning rapid movement of the car/sending unit does not yeild the same results - slow action.
Needle generally stays in the last known position, but if off center, gravity may prevail and the needle drop to the side, not always.
The tan wire of the body harness goes to the sending unit. Testing this wire to ground would indicate the resistance of the s/unit. Sometimes the ground wire from the s/unit, the black one, going to the pass side strap needs a little cleaning to make a good connection.
Getting a 50 ohm (approx 1/2 tank) & 100 ohm (full tank, may read pass F) resistor, or a 0-500, 0-100 ohm potientmeter, and tie one lead to ground, the other to the tan wire of the disconnected harness to the gauge would help to see if gauge is working. It will never read exact, just an indication of level in tank.
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