Headlight Issues

[1987square]

I've been replacing parts on this truck with my son. Putting it back together and having headlight issues, no wiring was replaced and all lights worked before. Not sure if this matters but the gas tanks and bed are not on the truck. Driving lights all work in 1st position. When pulling the light knob to the headlight or second position the driver's headlight and parking light are much dimmer than the passenger headlight. When turning on the brights, the drivers side headlight and parking light are very dim. Also, when in the brights position the left turn signal indicator is illuminated on the dash and won't turn off. I've cleaned all the grounds, and cleaned the connectors at the lights with no luck. Not sure what my next steps should be.

 

[PrairieDrifter]

That's definitely a ground issue imo. Two headlight grounds on each side of the core support. Make sure the ground from the firewall to the engine block is good. Then there should be a ground from the core support to the frame on the passenger side. Then your battery should be grounded to the engine block. Check your tail light grounds too.

Sounds like a ground issue in the headlight system. Could be a headlight switch/connector issue too possibly.

 

[Grit dog]

Agree with ground issue. And likely it’s something you removed. Since they worked before.