I just picked up a 1992 f350 7.3 idi zf5 4x4 crew cab and all the doors opened when I was looking at it but at the first gas station I locked them all and fortunately the driver door did not lock because now the other three are stuck locked and shut. I got the driver door lock working properly now, but I cannot get the other three doors open. I've shot a can of pb blaster into the latches and I took the door panel off of the lr door and got to the rods, the lock is moving and feels like it's engaging and disengaging on all three doors. I think the lock is somehow stuck in the latch itself. Does anybody know anything I could do to get these doors open?