Re: 1996 Mustang Needs lock fixed on door.
Hi lagnaf. Are you meaning the interior door panel or the plastic sheet under that. I will take it you are meaning the main interior panel. There is a number of plastic buttons or clips that fasten the panel to the door frame which can be quite hard to pull out. If you carefully prise the panel back with a wide blade screwdriver going around the edge ,you can locate where these buttons are and place the screwdriver right at the edge of these buttons and carefully pop them out. There is a toll that can be purchased for not much money that has a flat blade with "U" shape cut out of the middle. This is pushed in so the button is in the middle of the U and then the panel is levered to pop out the button . This can save damaging the panel. Good luck.
71 429SCJ Mustang