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Central Locking Gremlins

1992 - 1999 M3 (E36) - Bimmerforums - The Ultimate BMW Forum - forums.bimmerforums.com
Alright new on this forum and I know the usual response "use the search button''. Believe me I have searched the internet high and low and just want some opinions.

SO here we go I have a 97 M3 4 doors that I've owned for 12 years not sure exactly when this issue arose but when I lock the doors I get varying results. If I use the key in the drivers door I can get all the doors to lock either on the first or second try depends. If I use the key on the pax door the drivers door does not lock. If I hit the lock button on the center console the doors will lock after some cycling of the locks but the drivers door usually never locks. If I use the remote the drivers door usually never locks but all the others will after some cycling.

I've pulled the drivers seat out to check the wiring underneath, it looked brand new no corrosion. I pulled the glove box and looked at all that wiring and crap looks good too. I pulled the door card off and checked the actuator in the drivers door. I have 11-12 volts when you hit the lock button or so it appears it comes and goes quick. Not sure how to test the other wires that are there that give it the lock unlock signal. Before i started messing with it you couldn't hear the drivers door lock actuator trying to work, now you can but it seems to having trouble getting it up or down(no pun intended).

I don't think its the door switches and Im questionable about the drivers door lock actuator, I have replaced it before.


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