Dakota 4WD V8-5.2L VIN Y (1998)
Power Door Lock Actuator: Testing and Inspection
Before you proceed with this diagnosis, confirm proper power lock switch, Central Timer Module (CTM) and power lock switch output circuit
operation. See Power Lock Switch and Instrument Panel, Gauges and Warning Indicators/Audible Warning Device Control Module/Central Timer
Module in the Diagnosis and Testing. Remember, the CTM circuitry controls the output to each of the power lock motors.
1. Check each power lock motor for correct operation while moving the power lock switch to both the Lock and Unlock positions. If both of the
power lock motors are inoperative, go to Step 2. If one power lock motor is inoperative, go to Step 3.
2. If both of the power lock motors are inoperative, the problem may be caused by one shorted motor. Unplugging a shorted power lock motor from
the power lock circuit will allow the good power lock motor to operate. Unplug each power lock motor wire harness connector, one at a time, and
recheck both the lock and unlock functions by operating the power lock switch. If both of the power lock motors are still inoperative after the
above test, check for a short or open circuit between the power lock motors and the CTM. If unplugging one power lock motor causes the other
motor to become functional, go to Step 3 to test the unplugged motor.
3. Once it is determined which power lock motor is inoperative, that motor can be tested as follows. Unplug the wire harness connector at the
inoperative power lock motor. Apply 12 volts to the motor terminals to check its operation in one direction. Reverse the polarity to check the
operation in the other direction. If OK, repair the short or open circuits between the power lock motor and the CTM as required. If not OK, replace
the faulty power lock motor.
