When I squeeze outside driver's door handle on '94 sedan, all doors lock(except passenger door).(Passenger door lock does not work with central locking either with key in driver's lock or using driver's door knob.)

If I put key in driver's door lock and turn and hold, I can open driver's door w/o other doors locking. Without turning & holding key, the other doors lock.

I've had interior door panel off, but don't see the problem and access is limited.
Thanks.