see my other posts....so now on top of no speedometer, no interior lights, the gas gauge is now bouncing around an then registering empty..all these issues must be related....any ideas out there?...I've done a ton already, I assume now I need to trace wires perhaps the c507 connector?

 

check all your grounds. similar issue happened to me and it was a ground wire from the starter to the block. prob not the same issue, but similar enough to warrant looking for the grounds.

 

Thanks! I read through every single post on this forum that may give me a lead!! I found some good schematics of various connectors and ground issues/locations... One guy had an issue that was the Thermostat grounds.. Others have had bad wires coming fro the C507 connector... I'll be checking all I can, using my digital meter to check voltages too etc. and hopefully figure this out!!