When the relay fails or has issues it can cause problems with the operation of the door locks.
Power door lock switch fuse.
The door lock relay is the relay responsible for sending power to the door lock actuators so that they can lock and unlock the vehicle.
Check those fuses first but check all the fuses before deciding that a blown fuse is the cause.
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Determine from the chart or the diagram on the fuse box lid which fuse or fuses control that device.
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To unlock the doors the switch reverses the polarity of the voltage applied to the solenoid.
When the relay fails or has issues it can cause problems.
Order power door lock relay for your vehicle and pick it up in store make your purchase find a store near you and get directions.
You should see the voltage polarity toggle with each switch activation.
Replace any blown fuses and check if the device works.
Inspect the fuse that.
There are three primary components of the power door lock system that can fail resulting in a useless power door lock.
To lock the doors the switch provides voltage to the two terminals of the solenoid.
Unplug the door lock actuator electrical connector.
A fuse is a low resistance resistor that creates overcurrent protection.
Door lock systems operate the actuator by toggling positive negative voltage to the actuator.
Turn the ignition switch to lock 0.
Diagnosis if all of the door locks are inoperative start your diagnosis at the fuse box.
The switch provides power to the door lock solenoids.
The door lock relay is the relay responsible for sending power to the door lock actuators so that they can lock and unlock the vehicle.
Power door locks are prone to failures due to electrical interruptions corrosion broken wires or blown fuses.
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Find out why a lack of any movement in door locks is most likely a result of a blown.