HID headlights and DRL

Old 12-18-08, 12:41 AM
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HID headlights and DRL

1999 gmc envoy, i have no headlights or daytime running lights but high beams work...this system also has the dash light sensors which turn on the headlights automatically. Fuses all checked ..any ideas...
Old 12-18-08, 01:23 AM
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Bad Bulbs?

If I'm not mistaken, those HID bulbs are Xenon gas-filled bulbs, and they have the High and Low beams in one bulb.

It would be rare without noticing earlier, but the running lights/headlights (low beams) would come on with the dash sensor or switch.

Since the one bulb in each headlight does the job of both High and Low beam, it would seem that the low beam portion of your bulbs are blown.

Sounds like you need to replace the bulbs.

Any other advice?

Old 12-18-08, 11:21 AM
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I agree with Aces Dwn. It is amazing how many drivers do not realize that one low beam is out until the second one goes. New bulb time.

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