GM 13534192 BCM pin out diagram?

CAMTHEBULL

MEMBER
2023 CHEVROLET EQUINOX
40,000 MILES

On my 2023 eqinox The left front and right rear turn signals are showing they are not working. The bulbs do not light up because power is not being delivered to the bulbs.I checked all bulbs, wires, grounds. Everything seems good except I believe the bcm is not functioning properly. I need the pin out wiring diagram so I can check each wire.

Saturday, December 20th, 2025 AT 9:11 PM

2 Replies

KEN L

MASTER CERTIFIED MECHANIC
54,291 POSTS

Sure, but I would do a CAN scan to show if the BCM has codes of failure stored. Also, with the key on check the fuses on the BCM as well. I have seen a bad fuse cause this issue.

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

So you may have a bd BCM if the fuse are good, has the car been in an accident recently? This can cause wiring damage, also rodents can eat wires as well. Also, you might wat to try doing a hard system reboot to help reset the system, this video will show you how

https://www.youtube.com/watch?v=INiDRO5A5MY

Here is the location of the BCM, (I have seen these get wet and fail) you can find a preprogrammed unit if you search google or ebay, I would check the electrical connector for corrosion, after you disconnect the battery, please go over these guides and get back to us. Check out the images (below). Ken

Images (Click to make bigger)

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Sunday, December 21st, 2025 AT 11:52 AM

CAMTHEBULL

MEMBER
2 POSTS

Thank you. I scanned it and no codes. No accident ever. Yesterday the hazard lights would not light the bulbs up in the left front or right rear. Today they do but turn signal with same bulbs still doesn't work. The radio screen has worked all day today, Yesterday was blank most of the time. I took it on a 900 mile ride yesterday and today. I ran a wire from front right to rear right just so I had rear signals while driving. The right side flashed fast and indicated it was out but with my jumper wire was working. It all started with radio screen going blank to staying blank. Then the turn signals stopped. Now radio working all day still no turn signals. I couldn't find a pre-programmed one on internet.

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Sunday, December 21st, 2025 AT 2:13 PM