How does a power door lock system work?
The process is similar when you move the switch to the lock position. When you use the key fob to lock or unlock the doors, the receiver provides power to the unlock and lock control coils and the system operates just like if you had used the door switches. Start by checking the fuse. Then check for power at each door switch.
What to do if your power door lock is not working?
If the ground is good, remove the door trim panel and check for power and ground coming into the power door lock actuator. If the relay and switch are working properly but you’re not getting power and ground at the door lock actuator, check the wiring harness in the hinge area of the door.
How does a power door lock work on a Chevy Malibu?
Here’s a power door lock wiring diagram for a 2009 Chevrolet Malibu. The body control module (BCM) supplies a voltage to each door lock switch. When you move the switch to the lock position, the switch grounds the supply voltage and the BCM sees a full voltage drop.
What happens when you move switch to lock position?
When you move the switch to the lock position, the switch grounds the supply voltage and the BCM sees a full voltage drop. It interprets a full voltage drop as your request to lock the doors. When you move the switch to the unlock position, the switch sends power to a 1.5KΩ resistor and then to ground.
Why do power locks lock but wont unlock from buttons?
If both functions do not work, it could be the master switch. it locks but dont unlock on both sides so replaced both switches with new ford switches and still doing same thing thats why Im now stumped because key fob works and door key pad on drivers door works. was told maybe the VSM vehicle security module may be bad?
Can a key fob unlock the passenger side door?
The passenger side will unlock all the doors if they are locked, but it will not lock any doors. I also have a remote key fob, it will unlock the doors if they are locked, but will not lock any doors, I do hear what appears to be relays clicking either way.
What to do if your door lock relay is not working?
Power door locks do not function. If your power door lock system is having any issues, or you suspect that your relay may be having a problem, have the vehicle inspected by a professional technician, such as one from YourMechanic, to determine if your car needs a door lock relay replacement.
What do you need to know about power door locks?
Power door locks are a feature that has nearly become a standard feature on many newer vehicles. They make the task of locking the vehicle’s doors as simple as pressing a button on the key fob or inside of the vehicle.