Flickering brake light, possible parasitic draw?

Tiny
BLUNDER2121
  • MEMBER
  • 2009 CADILLAC CTS
  • V8
  • 2WD
  • AUTOMATIC
  • 132,000 MILES
It's some kind of parasitic draw. Only the driver's side light flickers. I tested both headlights by plugging them both in on the passenger side and had no issues so it's not the actual light. I pulled the fuses and checked those. No issues. When I connect the battery, any light plugged into the driver's side does this. I pulled the seats out and checked the wiring connection and there were no breaks on the wire. It looks perfectly fine. Any ideas?
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Sunday, August 7th, 2022 AT 8:18 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
Thanks for the video! I have seen this before it is the BCM that is going out. Here is the wiring diagrams for the exterior lighting system so you can see how it works and the BCM replacement instructions and location in the diagrams below.

Body Control Module - 22860591- $397.80

Body Control 1.5 hours

Check out the diagrams (below). Please let us know if you need anything else to get the problem fixed.
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Monday, August 8th, 2022 AT 10:06 AM

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