I know there are threads out there about this, but I can't find the answer to the exact problem I'm having. I added some signal mirrors to my Tahoe a few weeks ago and recently got the master switch for power fold. I put the power fold switch in and everything worked last night. Now this morning nothing works in the driver door. No backlight, no windows, no mirrors... The DDM fuse is not blown, but that is all I had time to check before work.
Do the master switches need to be programmed to the VIN or something? My truck is an 05 and I think it had heated mirrors, but no signal or power fold. The signals and dimming on the drivers side worked fine without the new master.