Wierd Headlight Issue

[cav13]

hey guys, if you could help me out that would be great. Right now my trucks low beams do not seem to be working. I have checked the bulbs they are fine. When the truck is idling with the headlight switch in the off position, I have the daytime running lights working. When I turn the switch to the headlight to the on position, the only thing that comes on is the parking lights and you see the daytime running light do a slight flicker, almost like it was going to turn on but decided not to. It only does that when the switch is turned to the on position, it doesnt remain flickering. So basically at night its almost impossible to drive because all I have is the dim daytime running lights on... Also the highbeam works just fine.

[jdubub]

check the fuses inside the truck and under the hood

[cav13]

Hi, I just did that, everything seems ok there.

[jdubub]

that is strange. someone else will chime in with some help. you may want to double check ANY fuse listed that has to do anything with any lights on the truck. I have seen a few fuses before that were shot and you could not tell

[cav13]

fuses are fine, even crawled under the dash and removed the DRL relay, which turned off my DRL's, however when i turned the headlight switch to on, the headlights come on, but at the exact same brightness as the DRLs were... so the headlight switch inside the truck works..

[flhusa1]

have you checked your low beam relay?

[cav13]

where would I find this low beam relay? pictures or diagram would be appreciated. thx

[ChevyTech77]

I have no idea what year or model of vehicle that you're working on because I don't see it listed here but it sounds like your high/low beam dimmer switch may be out.

[cav13]

hi, its a 1998 GMC sierra, could there still be a problem with the switch considering I removed the drl relay, which turned off my DRLs... then turned my headlight switch to on, which turned on the headlights (but still as dim as DRLs) Would this not confirm the switch is actually working and the headlight turns on?

[ChevyTech77]

That would confirm that your headlight switch is o.k. but the drl's are the same intesity on this vehicle as the regular low beams are. Sounds like you need a hi-low dimmer switch.

[eldreder]

this probably won't be helpful, but i had this exact problem yesterday on my 98

 

all i did was turn the switch to headlights on and click the high/low stick a couple times and they have worked since

[cav13]

so you turned your headlights on, and just switched back and forth from high beam to low beam until the headlight kicked in properly?