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Dan
Dan, ASE Certified Technician
Category: Buick
Satisfied Customers: 1368
Experience:  Dealer Auto Technician
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Driver low beam doesn't work and high beams don't work

Customer Question

Driver low beam doesn't work and high beams don't work either
JA: Have you checked the bulbs and fuses?
Customer: Yes
JA: What is the model/year of your Buick?
Customer: 2006 Buick lucerne
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: Checked power to the driver low beam and no power
JA: Anything else you think the mechanic should know?
Customer: Is there a headlight module?
Submitted: 4 months ago.
Category: Buick
Expert:  Dan replied 4 months ago.

Hello my name is***** am an ASE Master Technician and I am glad to help you out with your question.

Expert:  Dan replied 4 months ago.

Here is a wiring diagram of the headlamp system.

Customer: replied 4 months ago.
Is it commen for the headlight modules to go bad?
Expert:  Dan replied 4 months ago.

The BCM controls all lighting functions with inputs from the Headlamp Switch and Dimmer Swtich. Within the Underhood Fuse Block are two Printed Circuit Board Relays one for Low Beam and one for High Beam. When grounded by the BCM, they supply Voltage to the LT LO BEAM and RT LO BEAM fuses. Or LT HI BEAM and RT HI BEAM fuses.

Expert:  Dan replied 4 months ago.

I would check the voltage coming out to the drivers headlight from the bcm.

Expert:  Dan replied 4 months ago.

check voltage at the Left LO beam Fuse.

Customer: replied 4 months ago.
Where is the BCM located?
Expert:  Dan replied 4 months ago.

Right side of glove box under dash.

Expert:  Dan replied 4 months ago.

Here is a diagram of the BCM

Expert:  Dan replied 4 months ago.

Please reply to this if you need more help and we can continue this conversation. If you are satisfied with my service, please rate at the top of the screen. Rating does not close out your question. Remember, sometimes it is difficult to completely diagnose your vehicle without being there, but I will try to give you the best answer I can. If I am not giving you 5 star service, please let me know what I missed.

Thanks,

Dan

ASE Master Technician

Expert:  Dan replied 4 months ago.

Most common problem is the wiper motor itself. I would start with replacing the part. I have seen this before and replaced the wiper motor and the wipers were working properly after repair.

Expert:  Dan replied 4 months ago.

Let me know if you have any more questions. thanks

Expert:  Dan replied 4 months ago.

Hello again Dan here,

I am contacting you because the post has not been closed or rated.

This question is coming up on 7 days which means it will close.

You have already paid to get this question answered, but you have not rated.

Let me help some more. Is there anything else I can help you with?

If I did not give you 5 star service, please let me know what I missed.

I do not get compensated for my time and resources unless you rate me.

Thanks

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