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2013 yukon xl. brake lights are out. top brake light

2013 yukon xl....

2013 yukon xl. brake lights are out. top brake light working. looking to see which fuse to replace

Mechanic's Assistant: Have you checked the brake fluid? How's the level and when was it last changed?

Brake fluid checked about 6 months ago with last service

Mechanic's Assistant: Are you fixing your Yukon XL yourself? What have you tried so far?

I will try to fix it myself if it is an easy fix. I have not tried anything yet

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Answered in 28 minutes by:
8/4/2017
Mike S.
Mike S., ASE Certified Technician
Category: GMC
Satisfied Customers: 8,106
Experience: GMC N.A.I.S.E. Certified Auto-Mechanic
Verified

Hi, I am Mike, welcome. I'm reviewing your question.

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Customer reply replied 11 months ago
thanks

Thee is no fuse in between the body control module and the stop lamp bulbs and that is where the voltage comes from. There is a fuse feeding the stop lamp switch before the bcm but since the high mounted stop lamps are working, It cannot be that.

I would check for voltage right at the bcm pin 2 connector x, where the light blue wire is with the brake pedal depressed. Maybe you just have a loose connection there.

Since the high mounted stop lamp does work, I don't see why you could not splice into that wire at pin 5 connector 5 which is for that high mounted stop lamp.

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Here is a copy of that wiring diagram I was just looking at.

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Customer reply replied 11 months ago
bcm pin 2 connector x- where am I looking for this?

The bcm is the body control module. It is located left side of dash, and that was connector 6 actually.

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Customer reply replied 11 months ago
Ok. I got the diagram. I will check it this weekend and give the bypass a try. Thanks

Here is a View Of Body Control Module.

Remove the knee bolster.

Did that answer your question? If so, kindly leave me a positive rating, so I get credit. After all, you have already made the deposit.
If you don't, the deposit you made will just sit there and I won't get my share of it.

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Customer reply replied 11 months ago
got it. thanks

Her is the Knee Bolster Replacement

Mike S.
Mike S., ASE Certified Technician
Category: GMC
Satisfied Customers: 8,106
Experience: GMC N.A.I.S.E. Certified Auto-Mechanic
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