When you use your remote or insert your key in the Drivers Front door all the door locks should work at the same time by the door lock motors electrically. If you have to manually unlock the door because it will not lock or unlock by the lock motor, you need a door lock motor. The drivers and passengers front door can unlocked with the key manually. The rear doors you have to pull up the latch. If no doors unlock electrically with the remote or drivers door lock, intermittantly or all the time, you will need a Central Locking Electronic Control Module. You will hear the "beep" but no door locks will fire at all. If you have odd door locks not working intermittantly you need a new door lock motor for each door lock that malfunctions. You can hear of the door locks are working electrically. Yes, they are common problem. If you can hear the door lock working but the door still doesn't unlock you need to take the door panel off and lubricate the door latch assembly and work the lock, loosening it up. This is common as well.
http://schematicsdiagram.blogspot.in/2012/03/this-is-how-system-operates.html
This will help.
Thanks.
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Since all the doors will not unlock electrically, I will assume your answer is the most likely.
Where is the Central Locking Electronic Control Module physically located?
This is a 1996 Saab Turbo, 5-door model.
I THOUGHT it was on the passenger side under the dash, but I don't see it there. Of course, I haven't taken the dash apart. I thought it would be easily accessible.
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