Originally Posted by getterdun

Since it sometimes works, it sounds like a wiring connection issue. To troubleshoot I'd start at the instrument cluster by removing the covers over the wire connectors. Then, with the engine running I'd watch the temp gauge while jiggling the wires. Would also disconnect the wire connectors to see if all pins are making good contact and spray both with wire connection cleaner. Would also tap around on cluster as needed to see if that causes needle to move. If none of this worked, I'd remove, disassemble, and remelt each solder joint. If the problem persists, I'd check for power to the temp gauge wires.

Good luck.

Originally Posted by DJayAce

To get to the covers over the wire connectors to start troubleshooting the wiring. You're talking about completely removing the instrument cluster (still plugged in) so I can get to the backside of the cluster where the covered connectors are plugged in at? Just want to confirm. Thanks for the great help.