I am unable to get my temp gauge light to work. I have tried other bulbs from the dash assembly in the temp gauge light hole but it will not work. The circuit on the back of the assembly seems to be in good shape . Any suggestions? Thanks Jimbo

First things first:
Do you have voltage to the light?
If yes:
1) check the socket or bulb
2) if the socket and bulb are ok, then check grounds

If no voltage:
1) check fuses and fuse clips for good connection
2) if the fuses are all good then check for continuity from the power source up to the light (use an ohm-meter with the power off).