What is causing my doors to not lock when using the key in the driver side door. on 1990 Volvo 240

when unlocking the doors,it seems a relay is constantly allowing the door mechinism to continue to engage to unlock.While driving a sound of moss code can be heard under the dash area.The doors cannot be locked as a unit, when turnig the key in the drivers door,only that door locks. If I lock the passenger doors,get out and lock the driver door with the key, all passenger doors unlock.

Asked by for the 1990 Volvo 240
1 answer
Check the lock switch in the lf door. This can cause some of the symptoms you describe