The power seats, power door locks, windows, heated seats, horn, factory alarm and my reverse sensors are not working?

MERKUM901

MEMBER
2004 CADILLAC ESCALADE
6.0L
V8
4WD
AUTOMATIC
199,999 MILES

Hello guys, the problem I'm having is with my interior accessories are not functioning. My power seats, power door locks, windows (I can let the driver window down only), heated seats, horn, factory alarm and my reverse sensors are not functioning. Knowing that they're all controlled by BCM I cloned 2 BCMs and installed them with GM relearn and still the same issues. I know it has to be something they all have in common. I've checked the lbec and tbc fuses and they're fine. The truck runs great. No issues starting but I do have a parasitic drain that I haven't pinpointed yet. I have battery disconnect on negative terminal for now. I also changed door switches and checked the power seat wiring to no avail. Any kind of help would be greatly appreciated. Thanks!

5 Replies

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

You need to check all fuses and circuit breakers for power (LT doors circuit breaker and RT doors circuit breaker) in the fuse panel on the lower left side of the dash with the key on. If all the fuses are good it sounds like you have a DDM that is out (driver's door module) to be sure we should do a CAN scan, you can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.

Here is a video to show you how:

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

and

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Here is one for about $99.00 if you need it:

https://amzn.to/3ZixY4v

Here is how to replace the DDM in case you need it, and I have included vital fuses to check as well. Check out the images (below). Please let us know what happens.

Images (Click to make bigger)

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Wednesday, May 3rd, 2023 AT 4:13 PM

MERKUM901

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12 POSTS

I will let you guys know the outcome I really appreciate it.

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Thursday, May 4th, 2023 AT 7:35 AM

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

Thank you, we want to get it fixed for you.

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Thursday, May 4th, 2023 AT 12:19 PM

MERKUM901

MEMBER
12 POSTS

Hey Ken! Upon following your instructions and installing the demo and checking the lebc fuse I was able to get my windows and locks working again as well as the driver's pilot power seat. I'm about to get a power seat switch for the passenger side and hoping that will be the issue. Any idea how I should approach the upra system not having any power. I short the connector under the rear seat to put it in diagnostic mode which wouldn't work because of no power. Also wanted to know what wire can I tap into to get a switch I installed lights' to operate with the interior lights. It's the folding mirror switch off of a 2002 escalade. As well as the dic from the same vehicle. Thank you, guys, for all the help.

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Saturday, May 20th, 2023 AT 8:17 AM

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

Thanks for letting us know, we are here to help, please use 2CarPros anytime. Please post your new question here, you must be logged in.

https://www.2carpros.com/questions/new

Cheers, Ken