Electrical issue
#1
Electrical issue
2022 GMC Terrain SLT, rear driver side turn signal stopped working, then rear backup light assembly stopped working, then the full tail/brake light assembly stopped working. Service shop tried reprogramming BCM and that did not work. Has anyone had this problem? There is no power going to the rear driver side of the vehicle. Any help would be greatly appreciated.
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CathedralCub (03-19-2024)
#2
Senior Member
Shop can program but don';t know how to test a simple circuit. Probably a splice going to the rear.
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CathedralCub (03-19-2024),
MindyH (03-18-2024)
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CathedralCub (03-19-2024)
#4
Senior Member
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CathedralCub (03-19-2024)
#5
Senior Member
True Car Nut
The shop probably should have tested the circuits before reprogramming the BCM to fix the issue.
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carfixer007 (03-19-2024)
#6
Retired
Had a 2021 Volvo truck come in and the wipers only worked when you hit the washer fluid.
Updated the LCM(Light Control Module), now works as should.
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Retired Administrator
2002 *-10 5.7 V8
2023 Jeep Rubicon Diesel
Retired Administrator
2002 *-10 5.7 V8
2023 Jeep Rubicon Diesel
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CathedralCub (03-28-2024)
#7
Senior Member
True Car Nut
Definitely. It is amazing how they are attaching some of the silliest things deeply to the code in the PCM. At the same time, in OP'* case a meter testing a socket would have been a better first test. Could have been a bad bulb or corroded socket for all we know.
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Mike (03-29-2024)
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