I had an aftermarket door lock installed at a shop approx. 2 yrs ago and a couple days back I noticed that I couldn't get my key to lock the door (I COULDN'T TURN THE KEY IN THE KEYHOLE TO THE LOCK POSITION). No biggie I figured I'll just use the alarm remote to lock the doors since the aftermarket door actuators are programmed to lock with the alarm engaged and vice-versa. It is also programmed to lock after I put the keys in ignition and start the car. It unlocks as soon as I turn off the car.
The problem is that every time I turn the car off and the actuator unlocks, I hear a grinding noise and I can feel the vibration when I put my hand against the door panel. AGAIN THIS ONLY HAPPENS WHEN I TURN THE CAR OFF. It doesn't happen in other cases when I use the alarm remote to unlock the door when the car is off. IT ONLY HAPPENS AS SOON AS I REMOVE MY KEY AND TURN OFF THE CAR. what could the problem be?

 

take off the door panel and maybe you can hear or see what the problem is

 

i am, just wanting to make sure ahead of time

 

probably is the actuator but seeing is believing.
ps its real easy to put power locks into a car

 

a set of door locks cost me 20 bucks each and I was going to install it myself but they offered to install it for additional 25 since I know the owner's daughter