My truck sat for about 15 years, yesterday I was able to finally get the rear tailgate window to go all the way down, using the dash switch, it would only go down once i started but would not go up. Got the tailgate open, and the metal panel removed, but now the window is in the way of the motor and electrical connections. I gotta get the window to move back up so I can check the motor. Anybody every tackled this problem? any help would be greatly appreciated !