check the wires were the door hinges are and the plug is clean.lf they look ok take the door lining off check plug is on door lock and are not trapped or worn anywhere.then you will have to try a newunit on the plug to see if it works. you do not need to fit it till you find if it is wrong as you most likely will be able to change it if new in box ask when you get it
bob, February 2012