![]() ![]() In most cases, the problem with a door lock actuator is limited to only one door. In some cars, a failed door lock actuator may lock but won’t unlock, or the other way around. If the electric motor or the mechanism inside the door lock actuator wears out, the door lock may lock or unlock slowly or work sometimes but not all the time. In some cars, a door lock actuator becomes noisy and produces a squeaking or buzzing noise when the power door locks are locked or unlocked. Sometimes a door lock actuator stops working completely. There are several reasons why a door lock actuator may need to be replaced. ![]() If the door remains locked in either or both of these cases, the problem is the actuator. By pressing on the unlock button on the door panel cluster.By operating a remote device or keypad to unlock the door.There are two ways to determine if the actuator has failed: Pulling up the knob on the inside of the door.Using the combination lock on the outside of the door.Pressing the unlock button inside the car.There are a number of ways that you can unlock car doors that have door lock actuators, including: The rack converts the rotational motion of the motor into the linear motion needed to move the lock. The last gear drives a rack and pinion gear set that is connected to the actuator rod. A small electric motor turns a series of spur gears that serve as a gear reduction. The power door lock actuator is a simple mechanical device. This makes the outside handle move without moving the latch, preventing the door from opening. ![]() ![]() When the latch is down, the outside door handle is disconnected from the mechanism so that it cannot be opened. When the actuator moves the latch up, it connects the outside door handle to the opening mechanism. A rod connects the actuator to the latch, and another rod connects the latch to the knob that sticks up out of the top of the door. In some cars, the door lock actuator is positioned below the latch. Car door lock actuators are designed to lock and unlock a door without the effort of pulling on a cable and rod. ![]()
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