Headlight switch

Hi 355cid.


I would replace the wiring connectors which can have bad connections from current going through excessive resistance. Lewts check the OHMs through the wiring here is a guide to help us get started with the headlight wiring diagrams below.

https://www.2carpros.com/articles/how-to-check-wiring

I have seen the headlight switch cause this problem as well.

Check out the diagrams (Below). Please let us know what happens.

Thanks for the help I ended up changing the switch and one connector with all need headlights and the problem is fixed! Thanks I love this site.

I recently bought a used 1992 chevy silverado. I installed 7 marker lights on the plastic skirt beneath the bumper wired into the parking lamps (4 wired to the right lamp) (3 to the left).These worked without incident for two days. I switched on the headlights and parking lights the other day and a puff of white smoke came from the switch. Fearing a fire I uninstalled the switch and took the cover off the switch to look for signs of a fire and i found it had been arcing on the inside... so i coated the metal inside with the grease already inside the switch and reinstalled it after uninstalling the marker lights. i switched on the headlights and the switch was giving off an electrical/sweet smell so still fearing a fire I uninstalled the switch again. What could be the problem? Do I need a new switch?

replace the switch and look at the connector going to switch, you will find that the terminals will be loose. using a small pick pry the terminals tighter to prevent the high resistance and remove all the grease.

Replace the switch, and cut out the burned terminals from the melted plastic connector body. You'll find at least two wires are hardened on the first four inches or so. That's from being hot. Solder won't stick to it and crimp-on terminals won't make a good connection. That will lead to a repeat failure.

Cut off that hardened part of the wires, splice in new sections, solder them, and be sure no sharp points of wire are sticking up, then seal them with heat-shrink tubing. Crimp on new terminals but then solder them too. Cut the melted plastic away from the connector body, then plug the new terminals onto the switch separately. Be sure they're tight. Loose connections cause resistance which causes heat, and a repeat failure.