Locked cab doors on 1999 F-250 with key inside.

It sounds like the linkage rods between the lock actuator and the door lock has come off. You'll have to remove the door panels (not going to be easy when the door won't open) but it can be done. Locate the rod on each door and pop it back into place. You may find a diagram on line, but you'll need to search for it.
Good luck...

Most often is a bent or worn-out linkage between the handle(s) and the release. Try locating the linkage and forcing it with a screwdriver or plier. Once you get it to open you can re-adjust them somewhat. I had to replace the outside handles mine due to excessive wear.

The key or the lock or both may be worn. You will need an auto locksmith. It is also possible that the lock linkage inside the door is broken.

You should be able to unscrew the antenna and slide it between the door and cab. If its too tight you can use a screw driver to gently pry the door open. Although this will depend on where your lock is located.

I would think the rod from the key cylinder to the door lock mech is off or broken.

These are pictures from when I put the keypad on my 2001 SuperCrew. The mech could be slightly different, I do not recall if this is different on the SuperCrew vs the SuperCab or Std cab trucks.

Viewed through the door panel opening ( key cylinder already out, you can see the opening rod is straight up by the red )



You can see the rod connected to the key cylinder in the upper left of this picture, down to the door lock. This is what you need to check.


Close up of the rod attached to the cylinder


This is a better shot of the key cylinder. The spring clip is removed from the cylinder, that is why it is free in the door. Take note of the way the rod attaches to the cylinder. This is plastic and could be the cause of your symptoms.


This is where I would start considering the door works as normal with the power locks both inside and out.

Lock linkage needs lubrication inside the door or check the lock selenoid or switch.

u will have to pull door panel off to look at linkage to upper latch if loose reconnect and open door, check for broken lock, if cable operated pull on cable with pliers to unlock, cable will most likely be broken on housing.replace cable. also check lock for foreign objects.

This is very common. what happens is the power door lock actuator freezes up and doesnt allow the linkage to move, you may have to use pliers to pull on the lever or remove the door panel to get inside the door and dissconnect the linkage from the actuator, then you will be able to unlock or lock with the key or lever its just the power lock wont work unless you replace the actuator, heres a picture of it and it located next to the latch on the door,

What you need is a long thin tool that locksmiths use that slides down the door window to the linkage inside the door. I have seen them sold at most 99 cent stores, believe it or not. I was surprised too. You just work the tool down and try to hit the linkage so that the button on the door moves, then you know you have the right rod. From there start pushing and tugging on it until you get the door lock to pop open. I have done it many times. Some people put a wedge between the glass and shine a light down in the door to get a better look if you have trouble finding the door linkage.

this This is what you have to do.Go to the hardware store and get a spring just like in the pic maybe smaller. Put the bottom side just like in the pic and the top side of the spring on the door cilynder. And you are done.