Early W126 Central Locking Problem
 

Hi Guys
Whilst changing my alternator belt I accidently shorted it out with the spanner. After getting it back together everything was Ok except the central locking system. Now when I try to unlock the doors nothing happens. I checked the pump and it works to lock the doors if I unplug it and plug it back in, all except the drivers door which will only work with the key. I presume there must be a regulator I can check. Any ideas would be much appreciated.
Mark