Drivers' headlight has no power, radio is out and passenger brake light is out?

Tiny
JENNIFER MCGLAUCHLEN
  • MEMBER
  • 2017 GMC ACADIA
  • V6
  • 2WD
  • AUTOMATIC
  • 58,000 MILES
I was putting in aftermarket LED headlights and the connectors didn't fit the bulb. I bought new connectors. When I clipped off the connector and stripped back the 2 wires coming from the headlight one of the wires made contact with metal and had a small spark. I continued to connect the new connector and bulb, and everything worked fine. The next day I checked it again and the driver's side didn't come on but the other lights in the headlight assembly did come on. Also, the passenger brake light now doesn't come on and neither does the radio. I have pulled every fuse under the hood and visually inspected them, and they are all good and seated. I used a light tester and all fuses pass. I used a DMM and I got 12v on both sides of some fuses and 0 volts on others. There is also 0 volts coming out of the wires going into the headlight. The is also 12v going into the fuse box. I also checked the fuse for the radio, and it was also good. I need help please!
Thursday, April 6th, 2023 AT 11:59 AM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,883 POSTS
It sounds like you popped the fuse on the BCM.

Here is guide to help and the fuse location on the BCM location:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Here are the fuses you need to check and the fuse location inside the car. If the fuses are okay, you might have a BCM that is out to be sure we should do a CAN scan, you can get a CAN scanner (Controller Area Network) from Amazon.

Here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

and

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Check out the images (below). Please let us know what happens.
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Thursday, April 6th, 2023 AT 12:26 PM
Tiny
JENNIFER MCGLAUCHLEN
  • MEMBER
  • 2 POSTS
Yes, the fuse for the BCM was blown. I replaced it and now the headlight and brake light work! Now trying to get the radio working again.
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Thursday, April 13th, 2023 AT 4:19 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,883 POSTS
Thanks for letting us know, we are here to help, please use 2CarPros anytime. Please post your new question here, you must be logged in.

https://www.2carpros.com/questions/new

Cheers, Ken
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Saturday, April 15th, 2023 AT 9:59 AM

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