RAM 3500 Truck 2WD V10-8.0L VIN W HDC (2000)
Power Door Lock Actuator: Testing and Inspection
On models with a base version of the Central Timer Module (CTM), confirm proper power lock switch operation before you proceed with this
diagnosis. On models with a high-line or premium version of the CTM, confirm proper power lock switch, power lock switch output circuit, and CTM
operation before you proceed with this diagnosis. See Power Lock Switch and Central Timer Module in the Diagnosis and Testing. On models with a
high-line or premium version of the CTM, remember that 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 power lock switch or the high-line or premium 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 power lock switch or the high-line
or premium CTM as required. If not OK, replace the faulty power lock motor.
For addtional testing please refer to Powertrain Management/Computers and Controls/Body Control Module/Testing and Inspection/ See: Body
Control Systems/Central Timer Module/Testing and Inspection
