Buick Repair Questions? Ask a Mechanic for Answers ASAP
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Locate and disconnect the IPC Dimming Module under the left side of the IPC mounted on the Heating, Ventilation and Air Conditioning (HVAC) module. Turn the headlights on. Verify battery voltage present on the Brown wire. Using a suitable jumper short the Green wire to the Brown/White wire. Verify the lights now work. If they do replace the IPC Dimming Module.
After receiving your answer I looked at my Haynes repair book to get an idea on what the IPC Dimming Module looks like, but there is nothing in the book that references this part name.
I also went to Autozone to find out what the IPC Dimming Module was and how much it would cost to replace. They were also unable to find this part name in their computer?
Is there another part name?
Thanks for the follow-up. Unfortunatley I've been traveling and haven't been able to work on the car. Hopefully this weekend I'll finally have some time. By the way, is it necessary to disable the air-bag system for this check/repair?
Finally had the chance to work on the care last weekend. Replaced the headlight switch and that solved the problem. Thanks again for your help.