The taillights are not working, can I get the taillights wiring diagram?

Tiny
DOLLABILL25
  • MEMBER
  • 2001 CADILLAC DEVILLE
  • V8
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
I've already checked all my fuses and bulbs, they're all good. I just don't have no taillights when I turn on my switch. I checked the switch with multimeter it's good. So, I was just wondering if you could help me with the taillight wiring diagram. Maybe it's a wire problem? Thank you
Tuesday, February 6th, 2024 AT 8:15 AM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,627 POSTS
So, there is a taillight relay I would swap out or test which this guide can help with:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Also, there is a turn/hazard module that can do out and cause this problem as well. Here is the location of the flasher module and relay (rear fuse panel) so you can check it out and I have included the taillight wiring diagrams as requested. Remove the left knee bolster, turn/hazard flasher module (1). Check out the images (below). Please let us know what happens.
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Tuesday, February 6th, 2024 AT 1:09 PM
Tiny
DOLLABILL25
  • MEMBER
  • 44 POSTS
No thank you, that's what I needed. Thank you again.
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Tuesday, February 6th, 2024 AT 2:51 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,627 POSTS
You are welcome, please let us know what you find to fix the problem.
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Thursday, February 8th, 2024 AT 9:10 AM

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