Hey guys my Headlights on my truck are stuck on it doesn't matter if the key is off or on I even unplugged the headlight switch and they still stay on the only way I can get them to turn off is to pull the fuse out has this happened to anybody? I can't figure it out

 

get out a multimeter and start testing. you obviously have an electrical problem somewhere. where exactly couldnt tell ya but it sounds to me like the wire that turns the headlights on via the switch is somehow in contact with a constant 12v source.

or if its a reverse circuit that grounds itself to turn on them you could have a short in the ground giving it constant ground therefore enabling the lights to be on all the time. either way your going to need a DVOM to get in there and start testing for ground continuity and a 12v source to the switch

 

Damn thats what I figured, I was hoping it would be something simple like a relay thats stuck, the funny thing is it was just fine then the truck sat for a couple weeks and the battery was dead (not completley dead just enough it wouldnt turn over more than twice). So I hooked a battery charger up to it and as soon as I flipped the switch to 200 amp start, the headlights came on....now there stuck on

 

it probally grounded itself out with 200 amps and was a reverse circuit.

 

Anybody know where I can find a good wiring diagram online?

 

x2

 

i get mine on alldata but it costs about 17 bucks

 

the headlights are controled by the body control module

 

I got it figured out it was the day time running light module even though my truck doesnt have day time running lights I guess all our trucks come from the factory wired for them I've learned....So if any of us hear about this problem again now we know how to fix it