Drivers side brake/parking light not working?

Tiny
JEFF DUDA
  • MEMBER
  • 2011 JEEP WRANGLER
  • 3.6L
  • V6
  • 4WD
  • MANUAL
  • 98,000 MILES
If headlights are on, rear left light is off. If park lights are on, both front and left rear park lights are off. Brake, left rear light off when parking or headlights on. Left rear blinker only works when the headlight and parking lights are off. Both rear brake lights work when headlights or parking lights are off. All rear-right lights work fine.
Sunday, November 5th, 2023 AT 10:40 AM

4 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
This sounds like the TIPM is going out which is common in these cars, but we should check the system ground as well. Here are the headlight and taillight wiring diagrams so you can see how the system works and I have included a guide to help you test the ground which I have marked in the diagram.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

If the ground is good, I would replace the TIPM, here is how. It is easy because it-self learns when installed. Check out the images (below). Please let us know how it goes.
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Monday, November 6th, 2023 AT 9:09 AM
Tiny
JEFF DUDA
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  • 4 POSTS
I will look into this. I greatly appreciate the help. I'll let you know how it goes.
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Tuesday, November 7th, 2023 AT 9:52 AM
Tiny
JEFF DUDA
  • MEMBER
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Okay, so with the headlights on and left blinker on (where currently the left blinker doesn't work), using the tester, I touched the blinker/brake light ground wire, and the light comes on. That suggests to me, if I'm reading right, the ground is the issue.
So, I just need to find the ground connection. I found two red prongs on each side of the front end of the center console, but no wires connected to them. I need to figure out exactly what I'm looking for.
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Tuesday, November 7th, 2023 AT 12:28 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
You can just add a ground to the circuit if that would be easier. (Black wire) Good find. The ground says it is between the body floor and between the seats.
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Wednesday, November 8th, 2023 AT 8:54 AM

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