Things you Find
Barracuda rallye dash has an instrument voltage regulator built inside the gas gage. An easy test to see if the circuit is working all the way to the tank is to unplug the wire to the sending unit at the tank and direct ground it with ignition switched on. If the gage goes to full, then everything from battery out to the sending unit is good. Dont let the gage stay pegged like that for long since the gages run on 5.5-6.0 volts that's the reason for the regulator. Its street the voltage down.
Also see if theres a grounding jumper clamp clipped to the metal fuel line on either side of the rubber hose connection at the sending unit. This is the ground path return that jumps the rubber hose. Without it the sending unit will not read either. See pic below of the grounding jumper. This straddles over the rubber hose connection at the sender and uses the metal fuel line clamped to the chassis as part of the ground return. If your car doesnt have this or some sort of ground wire off the sender, then check that first before shorting the sender wire to ground and looking for gage deflection.
Barracuda rallye dash has an instrument voltage regulator built inside the gas gage. An easy test to see if the circuit is working all the way to the tank is to unplug the wire to the sending unit at the tank and direct ground it with ignition switched on. If the gage goes to full, then everything from battery out to the sending unit is good. Dont let the gage stay pegged like that for long since the gages run on 5.5-6.0 volts that's the reason for the regulator. Its street the voltage down.
Also see if theres a grounding jumper clamp clipped to the metal fuel line on either side of the rubber hose connection at the sending unit. This is the ground path return that jumps the rubber hose. Without it the sending unit will not read either. See pic below of the grounding jumper. This straddles over the rubber hose connection at the sender and uses the metal fuel line clamped to the chassis as part of the ground return. If your car doesnt have this or some sort of ground wire off the sender, then check that first before shorting the sender wire to ground and looking for gage deflection.
