Just bought a beautiful '88 328 GTS and had it delivered cross country. Upon arrival, it seems to be in excellent condition with one exception -- the doorlocks don't want to stay locked. When I lock either door with the key from the outside or by pushing the lock down from the inside (with door closed, of course), the lock pin will go down easily enough but then immediately there is a buzzing from within the door and the lock pin pops back up, unlocking the door. When turning the key in either door in the opposite direction nothing happens at all... Since it does the same with both doors I'm suspecting an electrical problem as opposed to a mechanical one, though I'm open to any suggestions.