If the door lock actuators (integrated into the door latch assembly) are noisy and/or not working, the latch should be replaced. For some model years, the actuator for the sliding door is available separately from the latch.Google+
Car Problem Reports
Dodge Caravan New Latch Assembly Will Solve Noisy Power Door Locks
Dodge Caravan Problem
Average Mileage: 169,000 mi (125,000 mi - 213,000 mi)
Visitor, 1997 Dodge Caravan, 213,000 mi
same as above
Both driver and passenger side door lock mechanism does not lock driver side door. Drive side door must be locked manually.