I have an 04 qaud cab diesel. The passenger side and both rear doors will not unlock. They will all lock. The driver door is the only one that will unlock. The drivers side will unlock from both driver and passenger side switch. I fixed all the broken wires in the doors. I ohmed all the switches. Seem ok. When i test the wires from the instrement cluster to the passenger side switch i got 5 volts. There shouldnt be any voltage on the violet and light green wire unless the switch is pressed. If anyone can help i would greatly appreciate it. Thanks in advance.

 

You may need a replacement switch block. Rain, snow, etc over the years can eventually corrode internals. I've tried disassembling and cleaning/repairing switch internals with limited success. Eventually I just replaced it. Lot of options for source, shop and surf. 30$-50$
This is just one example:

https://www.ebay.ca/itm/APDTY-012559...t/311659346494

Hope that helps!

 

Thank you for the reply. Yes sir I replaced them. For some reason i have 5 volts between the passenger side switch and the instrument cluster. Even when i unplug the passenger side switch. I also tried a new rf module on the back of the cluster.