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Taillight not working, brake lights and turn signal do work?

Tiny
GWLEWIS2124
  • MEMBER
  • 2008 MITSUBISHI ECLIPSE
  • 3.8L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 113,000 MILES
I have had issues with my car for about three or months now. I tried to change the bulb and that didn't work. Then my car stopped staying charged. I took it to a mechanic who told me it was charging to 15v instead of 12. However, he didn't fix anything, and the car broke down on me again. I recently bought new taillights for both sides and my passenger side taillight doesn't work. However, the brake lights and turn signal work fine. Please help.
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Saturday, July 16th, 2022 AT 10:26 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
There is a front ECU that sounds like it is bad, but to be sure you can get a CAN scanner from Amazon for about $30.00. here is a video to show you how:

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

Here is a scanner link:

https://amzn.to/3o41KcZ

I would check all fuses first though #20 #21 in the under-hood fuse panel here is a guide and the taillight wiring diagrams so you can see how the system works. Check out the diagrams (below). Please let us know what happens.

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Sunday, July 17th, 2022 AT 11:40 AM

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