2003 GMC Sierra "high beams working headlights" Questions

...High beams will come on but low beams will not come on. If i pull over, turn off truck and let it sit for a while (20 mins.) and then turn truck back on, the low beams work. Is there a relay that is ...

GMC Pickup headlights wont work High beam work See fuse for the headlight low beam or the head light low beam filament is bad change it after testing it on the battery

...high and one for low beams if you find both relays ? try switching? this will confirm relay fault if you then have low beam but no high ? b4 you buy new relay other than tis the other possible fault ...

working but the high beams still work. i've changed the headlight switch, the bulbs abd switched the relays around and the fuses. what could be wrong with it? You need a new headlight switch my friend

...working unless you turn the dash dimmer light off, then you hear a noise outside the truck, and the lights come one. Neither the high or low work, then when they come on with the dimmer switch being ...

...good. then I would suspect the Hi-Lo dimmer switch bad. The LOW beam ground wire is YELLOW, the high beam ground is PURPLE. see if high beams work, if they do, then I suspect the dimmer switch is

...working on 2006 GMC Sierra I checked the relays, fuses, and bulbs and all were ok More than likely the switch in your signal arm is broken. You can tell mostly by whether your high beam indicator ...

...at the same time then id suspect a bad switch. However you might want to also check the bulbs. Also check that both low beams and High beams don't work. Always check the obvious first, like the

...the switch on the dash, is this true? The high beams don't go on either Check for power at the two headlamp fuses. If there is no power than try swapping the headlight relay. Let me know what you ...

...high and low beams work at the same time adding more amperage draw to the existing circuit likely will cause other electrical problems. You will be better off adding another set of lights on a new ...