Headllights wont come on - 2001 GMC Sonoma Extended Cab

If the switch is not consistant in turning the lights on and off, I would say that the headlight switch is bad!

Check if starter is getting power using multi meeter. If it is then starter is dad.

you have a short in the wiring..

if you know for sure that the headllights do work(not burnt out),i`ve this happen before,then it could be the headlight switch not working on the headlight side of the switch,or the dimmer switch is not working not allowing power to the headlights on either low or high beams.

check the ground fues. and will it still happen if the car is sitting still ideling???

Bad head light switch replace switch!

1st, switch #46 relay with the one right next to it, see if your lights go back on, if so clean the contacts of relay # 46 in the fuse box. If this doesn't work, replace it.

The newer models usually don't have to have the entire bulb replaced. Under the hood you should be able to look behind the light in question. Reach down where the wiring goes to the back and twist the bulb casing to the right and pull it out. There should be a sorta hologin type bulb. How ever if you have a model that it is just wires that plug into the bulb with no plastic casing then the whole bulb might need replaced like the old days. Let me knpow how it turns out. Please bekind to my attemp to help. I can't see what you have. A thumbs up for the effort would be greatly appreciated, Raz

Headllight adjusters are broken. Replacements can be purchased at most auot parts stores.

Wipe off all the dirt then break out the WD-40! just remember,cheesy plastic breaks ez,costs plenty.