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Door Panel Controls Only Work Sometimes

SSSilverado23

By SSSilverado23
in Ask A GM Technician

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SSSilverado23 Enthusiast

SSSilverado23

Posted
  • Author
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Switch or the drivers door module? Glad you got it figured out, let us know how it goes when you get it replaced....

 

Im hoping thats the problem. Idk what else it woukd be with all theose tests I ran. Im hoping for the best!

 

Sent from my SCH-I605 using Xparent Red Tapatalk 2

 

 

SSSilverado23 Enthusiast

SSSilverado23

Posted
  • Author
Posted

Hmmm i wonder what wire is the data wire? I suppose i should pull the boot off of the door and look to make sure no wires are broken?

bossier62guy Senior Enthusiast

bossier62guy

Posted
Posted

The most current wiring diagrams I have access to are for an 05. The class 2 serial data is a brown wire (connector 2). If I can find it's termination location on the inside of the truck you can disconnect both connectors and do a continuity check.

bossier62guy Senior Enthusiast

bossier62guy

Posted
Posted

I'm going to attach a couple of more pdf files. They are the schematics for the drivers door module and a picture (SP205) of where the class 2 serial data can be tested. If you don't feel comfortable disconnecting that splice pack and doing a continuity check take it somewhere. If you want to see more info google "silverado drivers door module" and you'll find plenty of folks that had similar issues. Keep in mind this is info related to an 05.

ddm.pdf

sp205.pdf

ddm.pdf

sp205.pdf

ddm.pdf

sp205.pdf

ddm.pdf

sp205.pdf

bossier62guy Senior Enthusiast

bossier62guy

Posted
Posted

Do you own a multimeter? If so disconnect both ends of the wire you're testing. Set the meter to OHMS and attach a meter lead to each end of the wire. A zero reading will mean you have continuity from one end to the other. I'm inclined to believe after doing a little reading on your problem that you have a wire broken somewhere in there. It may not be the serial data wire though but you've gotta start somewhere. If it's easier you should be able to disconnect connector C3 from the back of the IP fuse block and test it from there. C3 is a 12 pin connector, brown wire should be in position J.

SSSilverado23 Enthusiast

SSSilverado23

Posted
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Posted

Shoot! I finally got my whole door panel back on and the switch all installed and every single thing works but the power locks on JUST that door dont. That switch will lock the other 3 doors but not that particular door. Even with the key fob it will only unlock sometimes but not all the time and wont lock at all. Any suggestions now? :nonod:

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