i. i replaced the head ligts complete set and the switch at the seem time. on a 2003 gmc envoy . my problem is that i don't have running lits . only hi beam. what can b e the problem.

Asked by May 17, 2019 at 07:35 PM about the 2003 GMC Envoy XL SLE

Question type: Maintenance & Repair

I. i have a 2003 gmc envoy xl. i replaced both ligts sets and a switch at the
same time. the probles is. i don't have running ligts. only hig beams. they use
to come on automatically. now i don't have it> what did i did wrong? thank
you.

1 Answer

90

High beam headlights don’t work or low beams don’t work. The cause: A burned out bulb, or a problem with the high beam switch or relay. The fix: Replace the bulb, switch, or relay. If just one bulb fails to work in either high beam mode or low beam mode, it may be the bulb. Most headlight failures that are limited to just high or low beams are related to a relay or the high beam control switch.

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