I have a 2003 Ford Explorer Sport Trac and my power door locks will not lock the doors from the switch but will unlock them.
My 2003 Sport Trac will not not lock any of the doors when the door lock switch is pressed from any door. If I manually lock each door I can open all doors from using the door unlock switch, is there a relay that may be bad on the "lock" circuit and if so where is it located.