My Temp Gauge and Fuel Gauge aren't working...

Fuel gauge can be a few different things. The small 3-prong voltage reg on the back of the instrument cluster could be the problem. Could also be the small ground strap that should be cliped on the fuel line at the sender. It might be the sender itself. Check for power at the sender wire. I think it will be a low pulsing voltage. The voltage will be turning on and off due to the regulator. If voltage is present it will be the ground strap or the sender. If the strap is there the sending unit is bad. As for the temp gauge ground the sending unit wire with a ground wire to the battery. If the gauge sweeps from one side to the other the problem will be the sender. If it does not sweep could be the wire going to the gauge from the sender or the gauge itself. Hope this helps. Tod