I have an interesting issue with the door locks I could use some advice with. When using the key fob to lock / unlock the driver's side door, trunk lid and fuel door lock normally. Passenger side door, nothing. When I try to lock with the dash rocker switch, I hear a motor running but nothing will lock. If already locked, nothing will unlock.

If indeed there could be a break in the pneumatic line going to the passenger door where precisely is the most common location that the line tends to break. Is it inside that accordion style boot between the door and the fender or is it inside the door panel itself. Thanx in advance. I have been chasing this issue off and on most of the summer to no avail.