It could be faulty wiring or more than likely the fuse is blown. check the owners manual for fuse locations, and use the extra fuses to replace any blown ones.
Remove the power locks and windows fuse you will loose power for your windows also
Start with checking for blown fuses.
There is a Relay for the Power Door Locks, which I purchased today from Checker Auto parts, but I can not find where the relay is located. I am assuming or hoping that it is the Relay for both the Door Locks and Power Windows.
If the power door locks quit working on a 1979 Corvette, it is due to broken pigtail switches. With age and use, the pigtails break and leaves the power door locks inoperable.
A very common problem is to have broken wires in the harness going to the driver side door.
Key?
yes aftermarket kits are available the electrical components are already in the door
Check the fuse and relay.
The power door locks on a Dodge Caravan can stop working if the fuse is bad. Check the power door lock relay fuse that is located in the engine compartment on most Dodge Caravans. It should be next to the battery.
a loose or dirty electrical connection
you need to reconnect the battery
and your question is what??