My Skoda Felicia from 1998 has central locking (not remotely) which has problems. The doors can be unlocked through central locking from the front doors. However, the driver's side door only unlocks the rear right door and the passenger's side door unlocks all but the rear left door.
Left Front Right Front Left rear Right rear Left front (un)locks : x x Right front (un)locks : x x x
What may be wrong with my central locking system?