It can be your battery, when it doesn't have enough power the computer will not allow you to use power stuff. It can be also one of the relays which are responsible for stuff like power locks, power windows and so on.
Check your fuses.
the library should have a shop manual for this vehicle, you can make copies of the right sections :)
Remove the power locks and windows fuse you will loose power for your windows also
Same problem, but didn't replace the dome light.The locks will unlock but not lock.
Start with checking for blown fuses.
i don't have pwer to heater fan wiper, power windows, or power locks, some time when you just turn ignition everything is working soon as you start the engine it will quit
There is a Relay for the Power Door Locks, which I purchased today from Checker Auto parts, but I can not find where the relay is located. I am assuming or hoping that it is the Relay for both the Door Locks and Power Windows.
Pw= power windows Pl= power locks
First check for a blown fuse. Check to see if there is power at the motor. If there is power at the motor then the motor itself is bad.
If the power door locks quit working on a 1979 Corvette, it is due to broken pigtail switches. With age and use, the pigtails break and leaves the power door locks inoperable.
The fourth fuse in the interior fuse panel controls the power windows and locks on 2000-2001 Grand Prix. 25 amp silver fuse.