65 Valiant Tail gate window motor

Yes I have one of those problems to with a power tailgate window. First of all, don't believe everything the seller tells you. Secondly, clean the tracks and lubricate everything. Thirdly, does the motor make any sound when you hook power up to it? Did you remove the big access panel on the inside of the tailgate yet? If not, remove that panel and clean everything, lubricated, and if you have to, separate the motor from the rest of it. You might have to send the motor out to get repaired or rebuilt if it doesn't move.