How do you open a front door of a 1990 cadillac fleetwood broughham when the outside and inside door handles do not work?

If both the outside and inside door handles of a 1990 Cadillac Fleetwood Brougham are not working, you may need to access the door through the window or use a slim jim tool to unlock it manually. Alternatively, you could remove the door panel from the inside if you can gain access, which may allow you to reach the locking mechanism directly. If these methods fail, contacting a professional locksmith or a mechanic might be necessary for assistance.