Need Help With Electrical Gremlins

[TAWL_BOY]

My 73 has been running great. I was fortunate to have a fairly unmolested factory wiring harness.

I pulled out my factory dash to have my cage done and go with a BC dash.
I drove drove to the guy who help me with my cage's house(over an hour away) with no dash or instrument cluster with no issues.

Several days later, when I went to pick it up, it fired right up. Then I pulled the headlight switch and it died. The key wouldn't anything.

I checked the fuses, and finally used a jumper wire off the starter solenoid and was able to get it cranked and make the drive home.

Last night it happened again(still have the dash and cluster out) I was getting my stereo wiring lined out. I fired it up and it ran fine while I was tuning my stereo, then I pulled the headlight switch and it died.
With the key in accessory, I get accessory power.
But in on, nothing.

Help! The OCBR is days away.

 

[Steve83]

That suggests a poor ground for both the headlights & the ignition system. Use this diagram & the NEXT few to find & repair yours:



Read the captions.

 

[Viperwolf1]

Make sure the bullet connector is tight in the 10g wire that goes through the ammeter loop.

 

[TAWL_BOY]

It's funny. The Bronco spent the night outside the garage and it started right up the next morning.

Even before you posted up, I pulled the ammeter wire loose and plugged it back in and wiggled it some. It hasn't happened again.

Thanks for the help.

 

[DirtDonk]

If it looked a bit rusty at all, pull it apart and put it back together a few more times to break more through the crust. Or better yet, take some wire brush or sand paper to it for good measure.

It's your main pipeline for power to the entire rig. Literally everything.

Paul

 

[TAWL_BOY]

Thanks again.

After the OCBR, I'm gonna go 1 wire 3G and a modern fuse box.
Along with a long list of other stuff.