Window and door locks work evey once in a while how do I fix it

Hi,

faulty diodes or door switches are one of the few things related to doors/locks that can drain your battery. You need to ask the repair guys who changed the Window if any door lock parts were changed and the need to use a multimeter to check the battery for power loss once they fix their error.

Thank you.

How do I fix my power window and door lock 2008 pontiac torrent ??? Just one door these are not working on or all the power windows an locks ?

How to fix the Chev power window door lock switch - YouTube

? 5:04
https://www.youtube.com/watch?v=XDKaDURD8Sc
Jul 13, 2013 - Uploaded by spelunkerd
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Check the fuses for the lock and the window...

The power door locks and power windows in your vehicle are computer controlled. Each door has a computer module in it which operates the door lock actuators and the power window motors. All of the modules are connected together through the Class 2 data circuits. A scan tool capable of communicating with the body control computer systems in your car is required to properly diagnose and repair your door lock system.

could be a short to ground in the wiring circuit...

Just did this procedure I got from coloradofans.com forums:

"any type of power/voltage change seems to trigger this issue

The most common symptom is power locks fail and only the driver window quits, however that is on the extended cab.

Steps to fix and it works every time.

take door panel off driver's door
Disconnect the wiring attached to window and power lock control unit
disconnect battery cables
connect the negative to the positive cable(((NO BATTERY CONNECTED)))
This will act to short residual voltage in the system

5 minutes later
place the key in the ignition and turn to the run position
connect the wiring to the window/lock controller
connect the negative cable to the battery
then the positive
open drivers side door
turn key to the off position((do not remove yet)) you should get a series of dings through speakers telling you the key is still in the ignition
once it begins dinging pull the key out and you should hear the door lock solenoids trigger and the windows should work." - Coloradofans.com forums

inside the mechanical lock (The part that actualy holds the door shut when you close it) there is a switch that informs the control unit that the locking mechanism is either locked or unlocked. (door open or closed).

These switches fail sometimes, when this happens the control unit is not aware that you have closed the door
If the faulty switch is not informing the control unit that the door is closed, the central locking will not try to lock the door (because it thinks the door is still open).
The switch is integral with the lock unit, and they are not easy things to replace either.
remove the internal door trim. unplugg the wiring inside. remove the outer key barrel and unhook the cable from the outer handle to the lock unit. unbolt the lock unit. the window regulator will have to be unbolted from the window (remove the 2 plastic circular access panels and wind the window down to a level at which the 2 bolts are visible), lift the window clear once unbolted (using your hands, slide it upwards in its guide rails, stick it in place with tape).
once this is done the window regualtor can be unbolted (10 or so bolts) and removed, complete with the door lock.

I have had my 250 superduty for two years now, and have had to spray wd-40 into the latch hole evey oil change or so to keep the "door ajar" light out, or have the same problem as you. A little squirt around the latch mechanism and contacts and the light goes out.

This is because the either the fuse used is too small or there is a short in the wire.. hence the wiring shd be checked as well as the fuse rating..!!