I have a 1984 Volvo Turbo with the central locking system; when the driver's lock is pressed down the other doors lock, and when the dirver's lock is opened, it unlocks the other three door locks. The door locks have stopped working. When I press the lock I hear a click, but the locks don't move. I can manually lock and unlock all four doors. However, I suspect central locking system is responsible for a power drain on my battery. Two consecutive times when I the locks did not work, I returned to the car the next day to find the (new Volvo) battery dead. It takes a charge, but unless the central locking system works, then I return the next day to find the battery dead again. There is a door lock actuator that may be the cause, if there is a short, or if it a or part of it needs to be replaced; but I'm considering the short term option of pulling the central locking system fuse until I can have the car diagnosed/repaired. Will pulling this fuse create any collateral damage, other than disabling the interior, hazard, trunk, engine, and glove compartment lights?

Thanks!

 

If memory serves, there is a relay, maybe white, behind the center console above the ashtray. Mine had three in that area. The relay could be bad. Maybe try the search engine with keyword "power lock" etc, to find out more info on troubleshooting. Cheers