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Why is One power door lock not working on 2002 jeep liberty?

Power Door Lock Troubleshooting

- Check the fuse for the power door locks

- Check for a loose wire connection, or a faulty door lock switch

- Check the door lock actuator

Fuse:

- The fuse for the power door locks should be located in the fuse box on the driver's side of the vehicle.

Loose wire connections:

- To check for loose wire connections, use a multimeter to test for continuity between the door lock switch and the door lock actuator. If there is no continuity, then there may be a loose wire connection.

Faulty door lock switch:

- To check for a faulty door lock switch, use a multimeter to test the switch for continuity. If there is no continuity when the switch is pressed, then the switch is faulty.

Door Lock Actuator:

- To check the door lock actuator, apply 12 volts directly to the actuator. If the actuator does not lock or unlock the door, then it is faulty.

Note:

- If all of the above checks out, then the problem may be with the door lock control module. The door lock control module is located in the driver's door.