How do you fix faulty automatic door locks on a 1999 Pontiac Montana The door lock switches are inoperative inside but will lock and unlock by inserting the key in either door lock?

Answer 1

be for you change the controls look under the carpet on passenger side there is wiring there runs along the side look fro wires that are spliced from 1 wire to 2 wires repair them the best way to do that is cut the splice out add a small Peace of new wire and if possible solider them and use heat shrink wrap on them there near the front and one to lock is blue and i think yell once you have them together you can try them before you put all back together not had lift up the plastic runner and the side panel to lift up the carpet make shure the carpet is dry