It is part of the door actuator for the driver door. May need to get one from a dismantler like Paul Grant. It is an electrcal switch inside, or your cable from door to frame may be open. Also Fuse 4 in sattelite fuse panel 2 under dash may be at fault. From the RAVE -
When the doors are locked by the front exterior
key or the interior door sill ****, the internal
microswitches in the Left Front Door Lock Actuator
(M114) move to the “Lock” position. Voltage from
fuse F4 is applied to the lock actuators through the K
wires. The lock actuators are grounded at E201
through the microswitch contacts and the O wires.
The doors and the tailgate now lock. The solid state
load sensor/timer ensures that the motors operate
only for the time required to lock or unlock the doors
and the tailgate.