I have a 2008 Chrysler Town and Country Touring Edition. All of a sudden the power door on the paeenger side of the vhicle stopped working. I have to open and close it mannually, the power window and heated seat on that side also quit working. You can't operate the window from the master switch on the drivers side or operate the door from any of the switches that control that door including the key fob. All other doors work it's just the one on the passengwer side not working, where can I start looking first to diagnose this problem?

Fuse box for bad fuse or relay. Owners manual should tell you what controls what.

Check all under dash and under hood fuses with a test light or multi-meter.