1990 Country Squire, the key works for the back window to go up and down, also the pin goes up and down when i turn the key but the locking mechanism on the side doesnt move. I took the back panel off enough so i can see the metal arm move when I move the key and it also moves the window actuator but nothing happens with the lock on the side. I manually locked the side lock in the closed position and when I used the back handle it popped the outside lock open. Any ideas?