When you pull on the lever inside the car is it very loose, does it pull back down on it's own?
You may have a bad or broken cable. Have a friend pull the lever while you look at the lock, do any parts move?
For some reason the Tour is full of cables...(throttle, door locks, trunk, fuel door) It's a forest of cables!
Needless to say, if it's broken a salvage yard will have a replacement, but I have no idea how to change that one, the routing might be "fun"...
Good luck
Nate