Headlights

Asked by Steven Jan 30, 2019 at 03:19 PM about the 2002 Chevrolet Trailblazer LT 4WD

Question type: General

My lights on my 02 trailblazer wont trun off
when I shut my car off ive changed the
switch but they still stay on

3 Answers
11,605

FJ4072 answered 5 years ago

Steven, to narrow it down. When this happens again, swap relay # 45, with #46. See what that does for you. If it solves your problem, replace HDM relay. There's actually a recall for it.

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27,640

oilyspill answered 5 years ago

Thought this diagram might help? You can see relays and headlamp fuses. I did see some headlamp trouble codes, these are B type codes, manufacturer specific. You would need a code reader that will read manufacturer specific codes. The headlamp switch isn't in this diagram, the headlamp switch is monitored by the bcm, when you turn on head lamp switch it completes a ground and the bcm knows you turned on the headlamp switch and reacts accordingly. Just my opinion.

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