It really depends on what type of vehicle it is since the process is different between makes, and models.
There are resources online such as the 1aauto.com YouTube auto repair channel that has quite a few how to videos that show the DIY type person how to perform a repairs such as these.
A link to the channel has been included below.
To replace a rear window regulator on 2005 CTS Cadillac remove the side protection panel of the car door then adjust the regulator.
It is easy to replace the window regulator or window clips on the rear window of a 2000 Grand Am. The clips simply snap right onto the rails inside that door that connect to the window.
The regulator is shot. Replace the regulator.
HOW DO I REPLACE WINDOW REGULATOR MOTOR ON PASSENGER SIDE WINDOW
replace window regulator and/or motor
That would be EXTREMELY unlikely that any rear window regulator would fit in the front window, same side or not.
how do I replace the passenger side window regulator on an E250, 2006. the window will not release to push to top of window frame only half way?
It is best to replace entire regulator as one unit. Remove door panel. Remove bottom nut of regulator, and remove two top nuts of regulator. Loosen two bolts on bracket holding window. Support window, and carefully remove regulator as one unit.
Window regulator controls the up and down motions of your car window. Both electric and manual windows have a window regulator. Not the easiest part to replace, but once you dissembled the door panel it should be fairly simple to replace.
replace the window regulator.
Check if there is voltage to window regulator motor; if there is replace motor.
No