Join Date: Feb 2002
Location: N.W. Washington
Re: Wiring fun begins...
The gas gauge/ cluster issue is classic 67-68 grounding strap not grounding the gauge cluster. There is a flat piece of metal or a wire from the gauge cluster that screws behind the gauges under the top center mounting screw of the cluster (if that makes sense). Rust, new paint, or missing wire will cause the issue you are seeing, check that out.
The headlights if they both just stopped working could be the floor dimmer, they get old and rusty and when they quit so do your headlights. If the high beams work I would suspect the floor switch.
I bet 9 times out of 10 on our old cars when there is an electrical problem it's a bad ground, from rust or new paint or missing grounds.
My car appeared to be a wiring mess when I bought it, but after cleaning up some bad wires and re securing grounds, it has worked like a champ for years now.
Check all grounds first and make sure they are good, it will save you headaches down the road too.
Good luck with it!
1968 rs with an old school 354" SB2.2 pump gas motor.
Repetition does not transform a lie into a truth.
Franklin D. Roosevelt