All fuses are good. I've checked power to all wires in the door. As well as Ohm the wires. Cant find any wires broke! At this point in time. I believe it's the controller itself. I've taken it apart and cleaned it with 99% isopropyl. And still nothing!
I have check the ohm's on each wire that goes into the door from the fuse panel. They all checked out good. Relays check out good. Fuses check out good!
Cant find any broken wires coming into the door.
New controls module in the driver door, and still nothing
I have not done anything to any of the grounds. I was saying I need to check the ground post and grounding blocks. I guess.
I have now put a new driver door control module in, and that didnt do anything.. but cost me money! They are expensive
I'm not sure if a 2004 has one as my 2012 Silverado does. It's called a DLC, door lock controller, and it sits behind the rear passenger seat on the cab wall. The GMT900 trucks have tire pressure monitor and it uses the DLC. I don't think this is your problem but just to know that it might exist. If the side view mirrors are powered, do they work?
I looked up the driver door switch panel and it is nearly the same as my 2012. I had the one switch for the passenger door window became iffy. I removed the switch and took it apart. It is made like a remote control. A circuit board, a silicone membrane with carbon buttons that make contact to the circuit board. All it does is sends a signal on a data buss, it does no processing therefore it is not a controller. All I had to do was wipe the circuit board down to fix my little issue.
I forgot what it's called but there is a controller that does all the lights, locks, windows etc. I'm sure others can tell you what and where it might be.
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