How would you fix a 1990 Cadillac Fleetwood 60 Special if the front doors cannot be opened from the outside?

Answer 1

I would jimmy open one of the doors and preceed from there to do the repairs..making sure to fix the problem with the door handles first.

Rather than damage a door and/ or linkage, I would try to trip the LOCK / UNLOCK button to unlock all 4 doors. Could be tricky with hangers etc., but doable. Once doors are unlocked, go into rear of car and climb over front seat. You can then open the front door from the INSIDE handle. Most likely the linkage became disconnected on both. I know it works. Had to do it when I was a Cadillac tech.