Head lights issue
 

Just bought a 6 cylinder 1969 C10 and it’s on it’s way to Sweden now.
The seller told me that the headlights doesn’t work. He’s been driving the truck with only the parking lights on for many years.
So what would I look for at first? The ground or ?
Posted via Mobile Device

Re: Head lights issue
 

Could be grounds,headlight switch or dimmer switch.

Re: Head lights issue
 

^^^ Yeah, a basic VOM or just a simple test light will work. Check grounds at the headlamp connectors, check voltage from the fuse block to the HL switch to the dimmer switch (these are prone to failure) and then to the connectors.

Informative suggestions
Great 👍
Posted via Mobile Device

Re: Head lights issue
 

Had same issues. The dimmer switch, probably the dimmer switch. After many hrs, it was that darn dimmer switch...

Then I will look at the dimmer switch the first I do after the ground check
Thanks
Posted via Mobile Device

Re: Head lights issue
 

And then an upgrade to headlight relays would be good - made a world of difference for mine. They can be made or purchased. My kit was very easy to install.

Re: Head lights issue
 

Make sure the headlight units themselves work first then check grounds, then check power supply to the lights when the switch is on....

Check fuses

:chevy::gmc2::chevy::gmc2::chevy:

Re: Head lights issue
 

I just pulled a wiring harness out of my daughters 68 step. There are head light ground wires on both lights to the radiator support. Then I would check the lt- blue wire to dimmer switch it feeds it from the headlight switch. See if it has power. If not it's in the h/L switch are the red wire feeding it which is in the bundle of wires under the dash. It's a factory solder joint that is just taped up in the harness.
If you do have power then hook it back to the dimmer switch and see if it's working. Either way that's where I would start looking. :chevy:


http://www.jimbosprint.com/ChevyC20/...ruckWiring.jpg

[QUOTE=OregonNed;8619337]And then an upgrade to headlight relays would be good - made a world of difference for mine. They can be made or purchased. My kit was very easy to install.
I also bought
28 Circuit Classic-Plus Customizable 1967-72 GMC / Pickup Truck Chassis Harness P/N 10206.
Hopefully there some relays in it.
Thanks
Posted via Mobile Device