I have a 1987 bronco 4x4. The rear window went down and won't go up. With it down and can't move it up , I can't get to the motor. Can anyone tell me how to go about this task ? To get to the motor ?

 

Yeah, with the glass down, access to the motor through the cutouts in the tailgate are blocked by the glass.

If the motor runs in UP, but the glass won't go up, then the pegs on the plastic gear in the motor's gearcase are probably broken. That's not a bad thing in this case, because you can probably muscle the window up. Reach in with both hands into the cutouts, grab hold of the bottom of the glass, and lift it up with all your might. Try moving it a bit side-to-side to help if need be. If you can get it up to a few inches from the top, you can get to the motor, but the screws will be difficult because the glass will be right across from the motor.

Mine failed with the window just a few inches up from the bottom. I muscled it up to a few inches from the top, I couldn't get it any further. I was able to get the motor out, then with the motor out, got it up and closed by me pushing against the glass from the inside, and a helper pushing up right even with me on the outside. With the glass all the way up, it is easier to install the motor.

Another idea, if the motor on yours is NOT running in UP, you can fish behind the center section of panel and disconnect the motor wires from the harness plug. Then run the motor with a battery charger or 12 volt battery. On mine, applying positive to the red wire makes the motor turn CCW, which lowers the window, so applying positive to the yellow wire will raise it.