Re: ef falcon central locking worry
I had a similar problem with my EF sedan where the rear passenger door would'nt lock. After weeks of searching and pulling out actuators, I found a corroded wiring connector from the rear door actuator which was situated between the two doors, in the body. I crimped on a new connector and its now fine. So I would check all the wiring. Another possibility is of faulty diodes in a actuator. I bought the same rated diodes from Dick Smiths and they were like 20 cents each and easy to fit. Maybe try disconnecting an actuator from each door one at a time to try to isolate the problem.
Failing that it could mean the control unit is faulty and they are very expensive.