No functions on passenger door

CASWELL17

MEMBER
2004 CHEVROLET SILVERADO
6.6L
V8
4WD
AUTOMATIC
231,000 MILES

I have the truck listed above duramax with no functions from the driver side to the front passenger window or door locks.

The passenger door module has no functions either.

I do have 12v coming in on the orange wire

I have pulled the wires out of the door jamb and checked for broken wires

I have checked the driver side fuse for the passenger door

The PDM has been replaced.

7 Replies

KASEKENNY

MECHANIC
18,907 POSTS

I would suggest focusing on one of the two operations. I would use the door locks and test the voltage at the motor when operating the locks.

Take a look at the info below. I am wondering if we have two issues.

The locks operating directly from each module for each door. The windows are run through the master switch/DDM.

So if you have a window motor issue that would explain why neither of the switches operates the window but the locks run through the master window switch.

I would suggest checking the voltage at the motor and then go from there.

https://www.2carpros.com/articles/how-to-check-wiring

Let me know if you have questions. Thanks

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Thursday, April 22nd, 2021 AT 6:28 PM

CASWELL17

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4 POSTS

I have checked for power at the window motor, each leg to ground with the switch in the up and down position and I do not have voltage at the window motor. I have applied 12v to the motor to test it and it is good.

I also tested 12v at the door locks and I do not have 12v at the door locks in either lock or unlock position from the PDM.

Side not I only have seen the fuses to the left of the driver dash, and underneath the driver dash to the left of the steering column that controls the interior passenger/driver doors.

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Thursday, April 22nd, 2021 AT 9:43 PM

KASEKENNY

MECHANIC
18,907 POSTS

I just want to confirm you have voltage in the passenger door module B+ circuit and no voltage at the window motor. See below.

If that is the case, where you did you get the PDM from? If it was a new PDM then the only thing I can think is you either have a faulty module or the driver master module has failed and is corrupting the passenger side.

However, this is possible for the windows but the locks are driven from that door module. So if they are not working either then it looks like the PDM is the issue.

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Friday, April 23rd, 2021 AT 8:06 PM

CASWELL17

MEMBER
4 POSTS

On the incoming black plug I have 12v coming into the plug on the orange wire to ground.

I bought a ac delco switch online

Then after it didn't work I questioned it, checked all the wiring for breaks and when that was good I bought a local Dorman PDM to confirm and it didn't work either. So possibly the driver door module?

If the door locks are separate that's a little odd. The only power I have in the passenger door that works is the incoming orange wire in the black plug and the door speaker works but it splits off prior to the PDM.

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