Welcome to the forum. While I don’t have a wiring diagram specific to your vehicle, it might be an idea to locate the connector for these components and check, with a multi meter, for 12v input and ground. Chances are that your issue with with the wiring, either not getting the battery voltage, or that the ground is an issue.

 

Thanks for your answer! I suspect it might be a ground problem too. I don't know enough about this though to know where the ground might be found. In the manual I can see that apparently there is a ground from the regulator. I am not sure if that means the dash or the voltage regulator though...

 

Assuming that diagram comes from the factory service manual, the "body electrical system" should also include a write up on the fuel gauge and how it works. Do the warning lights (oil pressure & charge) on the instrument panel come on when the ignition is switched on?

You can try connecting a sidelight bulb in place of the gauge sender (both fuel & temp gauges), if the gauges and wiring are intact you should see movement on the gauge needle after a few seconds.

 

Thanks for the reply! I actually have not tried the checking the sensors themselves as I replaced them completely after I realized the gauges were not working on the dash. Everything else on the dash seems to be working perfectly fine...