ok, a couple of things:
1) To remove the motor for the first time requires drilling two holes in the sheet metal door panel, what you see after you take off the cardboard panel. So... if you go to the junkyard, you should be prepared to drill those holes, in case it has not been previously replaced. Seems to me like they have to be around 1/2" diameter.
2) A new motor off of Amazon should be around $40, maybe less... never know with Amazon. So, you know, we are talking about searching a junkyard, testing motors, etc... and they charge you $25... you might be better off just buying new unless you have a great deal of free time.
3) Actually testing a motor is difficult with it removed. It's not unusual for this motor to burn out a winding and under no-load conditions, it may not be apparent. Under load, it stops dead on the bad winding because it is turning slower. So, you would have to test it in a door.... the motor only has 2 wires, so if you connect to a battery one way, it goes up, the other way goes down. All the usual safety precautions here when connecting a car battery directly to test something. A fuse would be a good idea.... batteries can blow up if shorted.
4) I have had this problem, a lazy window, be the result of a bad 'one-touch module'... unfortunately, after I installed a new motor and got the same lazy window. You can bypass it, you just need to know how to use a voltmeter. You will lose the one-touch function, where the window rolls down automatically (up too? I forget).
5) If you have not already, clean the window tracks and everything that moves, then re-lube. That might fix it.
6) If the window operation is erratic, and you get the door apart, see if the motor is spinning but not operating the window. This is broken bushings, as Hudson mentions above. This is a $5 fix, plenty of YouTubes on it.
So.... let's see... I would approach it like this:
1) Take the door panel off and see if it's the bad bushings. If so, fix them, clean and lube everything.
2) If not, I'd bypass the one-touch module to rule it out. It's mounted in the door frame, pretty obvious.
3) If it's still not working, I'd replace the motor. I don't know, I'd buy new, but that's up to you.
4) If you end up replacing the motor, it's held on with 3 bolts. Stop somewhere and buy a few extra bolts. Here's the thing: It's a bit of a blind deal with the bolts. You have to go through the holes you drilled. It is very possible to accidentally drop a bolt in the door. If you do, it goes to the very bottom and you will instantly wish you had an extra bolt instead of spending a frustrating 1/2 hour trying to dig out the one that you lost.
There are good YouTube videos on all of this. I'm not a regular contributor here anymore, so I won't be replying to other comments. This is what I have. Good Luck!!!
