FSB member Steve83 has the best tailgate tech in his album bar none, just click on his black Bronco and it should take you right to it.....otherwise I believe it's on
www.supermotors.net
You need to remove the TG access panel to get inside to do any work and usually the TG PW motors are riveted with "torque pins" to the "backing plate" so it doesn't "ratche" when activated. The regualtor arms have teeth that mate with the PW motor and scissor up/down to move the window so in order to remove it you'd have to drill out the "pins" BUT on the other end of the regulator arms there are "toggles" that slide in tracks on each side of the TG box so just disconnect them from the track and that should help getting the window up/down manually.
Also make sure the tailgate closes "flush" with the body line otherwise the safety switch prevents the window from working, checking the adjustment using a T-50 torx socket will enable you to loosen and "rotate" the bolts in place or completely unscrew out to put on new bushings using lubricant to help slide on, are the anti- rattle devices for Doors and TG, "door striker bolts" part # 38420 -$7.99 Doorman mfg. and "door striker bushings" part # 38424 - $3.99 Doorman mfg. both of which can be found in the Help section in most auto stores.
When the window goes down either manually or electrically it catches a "rod" on the way down in order for the TG handle to "clear and release" the cables for latches on either side and the window needs to be below the top of TG line otherwise when you pull on the TG handle, it won't work and you can "bend" parts where it won't function properly to clear/release so in this case you's need to remove the access panel and pull both cables towards the center to open and drop the TG.........REAL PITA.....lol lol
Steve83's tailgate tech helped me fix that issue for me and now I can open and drop the tailgate, the motor was out aready when I bought my BKO from the PO and I had it rebuilt but the TG is rusted badly and needs to be replaced so it's been sitting in a box in the garage....lol lol.....but I'm getting closer now $$$$$ and soon will be looking for a Cali rust free TG and then have the task of getting it all back and working electrically .......after 8 years of ownership.....lol lol
As for the dent, remove the access panel just look inside and see if it's affecting the movement of the window and if so pound it out and you're good to go!
Hope that helps Brother!
Good Luck ~ :thumbup