any suggestions, 1996 P38 and c/locking problems, basically using the remote handset I can lock both rear doors and tailgate front doors remain unlocked. If I manually lock drivers door with key rear doors and tailgate lock. Front passenger door remains unlocked. If I lock the front passenger door both rear doors and tailgate lock but not the drivers door basically both front doors locks have ceased to operate in conjunction with the rest of c/locking system