[Chrysler300] rear G window motor

Sure it is motor and not stripped nylon gears ?

Motors get wet and wrecked, but usually can be repaired...There is a little circuit breaker ( looks like ignition points) in them that rusts if water runs in, which in some orientations happens, then due to the rust, if no/bad contact there, it acts like open coils , as it is in common ground lead. I have disassembled brush end , you can short this contact out if damaged (or file it maybe) by soldering bare 16 ga wire from coil ends terminal on it to a new small hole in end cover you drill and solder shut with wire or small lug on 4/40 maybe. (forget exact details, did it several ways, on F boxes) ) Then free up brushes in holders so they slide . There are pros and cons of greasing slides, and springs to prevent sticking again ,.a tiny amount of wheel bearing grease maybe . Grease on front of brushes or commutator hurts it . Shorted overload thing means if you press down a button and hold for 5 minutes motor may burn out, but no one is going to do that to a 300 now ( dumb beyond belief if you do) . lube gears etc be sure window not binding, check rollers . drop of heavy oil on front and back bushing, do not overoil .

On front of motor shaft , stock , was a little rubber or plastic roof or umbrella, looks like a valve stem seal; those throw off the water keep it out of front bearing of motor (and resulting mayhem inside); they shrink and get loose. Were pliable and tight. Reseal with RTV, or silicone , maybe weatherstrip cement ? to shaft so water is kept out of motor front .

If nylon gear in case is stripped, it will appear to work on bench (pinion turns) but will not lift the window (AAUUGH! After all that work ) as nylon toothed gear spins around loose on center metal hub ; J-Y Chouinard in Canada has solid bronze gears , can rebuild gearbox box , so it is forever .

Good luck, motor can usually be salvaged!!

To test put – lead to motor frame, 12V to one or other lead ;

be careful of the big spring, it can really cut you up. mark how it is on there before disassembly