Help with 2003 2500HD LT

I have a 03 LT crew cab. Nothing on the passenger front door works. Not able to lock the door (all others lock) can not raise/lower window, heated seat does not work or rt side mirror does not work. These items do not work from the rt door controls or from the master control on the drivers door. All other doors work well from the drivers door or rt/left back doors. The auto lock/unlock key fob will not work also.
My question is "where to start looking"? Is it a bad master controller on the drivers door or could it be just the pad on the passenger side. Something is not giving power to the right door/side. A new driver side control pad cost about $200.00 and if that's not it, they will not take it back.
Any help will be appreciated

I have a 03 LT crew cab. Nothing on the passenger front door works. Not able to lock the door (all others lock) can not raise/lower window, heated seat does not work or rt side mirror does not work. These items do not work from the rt door controls or from the master control on the drivers door. All other doors work well from the drivers door or rt/left back doors. The auto lock/unlock key fob will not work also.
My question is "where to start looking"? Is it a bad master controller on the drivers door or could it be just the pad on the passenger side. Something is not giving power to the right door/side. A new driver side control pad cost about $200.00 and if that's not it, they will not take it back.
Any help will be appreciated


with these type of electrical problems you must troubleshoot this by removal of the door panels...with no info on what was found your guess is as good as mine 2000 miles away..

the pass door equiptment don't work ,,,get a meter and start probing the door connectors...cheaper than throwing parts at it !

with these type of electrical problems you must troubleshoot this by removal of the door panels...with no info on what was found your guess is as good as mine 2000 miles away..

the pass door equiptment don't work ,,,get a meter and start probing the door connectors...cheaper than throwing parts at it !

OK, I have the door panels off and switch exposed. What are you suggesting I start checking? Looking for hot wires, (12v)? There must be 50 plus wires connected to the driver side control. Any idea what wire/switch gives 12v power to the passenger door? All fuses I have looked at show good, unless I am not checking the correct fuse.
Thanks for your reply

I had the exact same problem when my truck was new, still under warranty. It turned out to be the control circuit board, and they changed it under warranty. j cat's right though, you can't be 100% sure without some kind of testing.

I had the exact same problem when my truck was new, still under warranty. It turned out to be the control circuit board, and they changed it under warranty. j cat's right though, you can't be 100% sure without some kind of testing.


When you say "control circuit board" are you meaning the switches and all (complete assembly) that is on the drivers door?

OK, I have the door panels off and switch exposed. What are you suggesting I start checking? Looking for hot wires, (12v)? There must be 50 plus wires connected to the driver side control. Any idea what wire/switch gives 12v power to the passenger door? All fuses I have looked at show good, unless I am not checking the correct fuse.
Thanks for your reply

since the passenger door is not working in any way remove the connector to the control switch assy. there,,,.how do the connectors look ...are they wet.corroded...connector not seated securely ? then with meter see if you have any 12volts to the wires at the connector...

you checked all fuses with a meter correct ????

there should be about 25 wires ,,,no big deal...

Yes, it's the board/switch assembly located in the door. I didn't know the technical name for it, but it's more than just a switch as it controls everything in the door, except the speaker.