Hi My 98 Montana door lock will not unlock the doors from the switch, they lock fine but won't unlock. I bought a new switch but no go, the passenger side does the same also. The remote lock works fine. Any suggestions?

Remove the passenger trim panel on the floor of passenger door opening and check the wires that are join together at that spot for the small white and light blue wires you wil find two wires into one for both at that connection they rot from moisture.