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Brake light troubleshooting

4K views 6 replies 4 participants last post by  g8a550 
#1 ·
Why would 3rd brake light work but not others? Any experience with this?
 
#2 ·
Hard to say. The BCM (Body Control Module) sends the power to the 3 lights separately. Maybe a BCM problem.

Have you verified the 2 normal brake light bulbs are OK? Some folks have reported both burning out essentially at the same time.

What year is your Traverse?
 
#5 ·
The 10amp fuse was issue and fixed the problem.
The “stop light” fuse controls left and right brake lights. Turns out the top brake light operates on a separate fuse and if that ever goes out, you’d have to read panel to find what controls it.

assumption was the same fuse controls all 3 lights but not the case.

hopefully it helps others along the way.
 
#7 ·
Doesn
The 10amp fuse was issue and fixed the problem.
The “stop light” fuse controls left and right brake lights. Turns out the top brake light operates on a separate fuse and if that ever goes out, you’d have to read panel to find what controls it.

assumption was the same fuse controls all 3 lights but not the case.

hopefully it helps others along the way.
If both the taillight brake lights and the 3rd were all on the same fuse when that fuse goes out all brake lights would be out instead of just the taillights or 3rd.
 
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