i have a 1999 citroen berlingo diesel multispace..the central locking is the type where you lput the key in the door to operate..i can open the drivers door..but cannot open the tailgate..

cliff, July 2012

It sounds like the wire between the body and the tailgate has broken (common fault) or the motor / activator for the lock has failed / bad connection. Disconnect the plug for the motor and test to see if there is a power supply or not when the central locking is operated if no power check the wiring in the body to tailgate connector (it may have a brake inside the wiring)

arizona kid, July 2012