Adventures in wiring...

[nh_mopar_fan]

I'm looking for advice.

Deb's 66 Valiant has had multiple wiring issues. I've worked through them all. Ran an extra couple ground wires off the cluster and am left with this:

Gas gauge move a little but eventually does nothing. Temp gauge seems to work fine with the lights off. When I pull the headlight switch to on, the temp gauge slowly moves to a full peg on the high side. If I turn the lights off, it slowly moves back to a normal position.

Would a bad voltage limiter cause that? I've got a new regulator that I need to install but I doubt that'll fix the problem. The "jumping" alt gauge stopped once I ran the extra ground wires.

The thing had a meltdown at some point and one of the areas that has had a repair was the headlight switch.

Anyone have any ideas on what else could be causing this?

[nh_mopar_fan]

No guesses?

[71_deputy]

check the ground to the block- nice and clean??? and also to the rad support- clean with tooth washers?

you already done the grounds to the dash- good

also think about adding another ground- fron the back of the block to the firewall- use a braided strap.

John Mac

[nh_mopar_fan]

You think it's a ground issue?

I'll look into those.

This headlight switch has had an issue at one point. There was a wire that was toasted and repaired. I'm looking at the wiring diagram and will also take a second look at the line out to the dimmer switch. I'm thinking that everything works fine until that final pull of the switch that powers the headlights. If grounding the positive of a gauge will peg it. I'm wondering if there's something in that circuit that could be causing it? On the bulkhead connector, the line that carries the power off the dimmer switch is in the same location as high beam indicator wire that comes off the cluster.

Does that make any sense?

Thanks for the feedback....