I've been repairing Ford window motors since the 1980's. I never had a bad motor, transmission and switches were the only problems I found. The 3, 1/2"X1/2" plastic dowels in the trans go bad, and get all chewed up. For years I've always made my own out od delrin, real tuff stuff. I got a HELPS kit once, that had the 3 dowels, and it lasted about 3 months. Rock sells a kit with the dowels, and new gear. I got two kits, and that job is next on the list. Search the forum, I've seen where a member took pics of the motor, and how to repair it. That's a good price on a new motor. With your problem of not working at all,I'd be looking at the switch.