Putting my zed back together after repaint and fitting all electrics in doors, locks,mirrors etc Problem central locking unit responding on drivers door all A OK Passenger side not working!!!.I do have several lock door catch units from several donor doors. should it be be possible to plug wiring into a unit uninstalled and see mechanisim work when triggered on drivers side with remote ??? to select a working unit to then install ?? or some one has better plan ?? thanks in advance for help