If you can hear the motor running, humming, or clicking when you press the switch but the window itself stays put, the problem is almost always in the regulator rather than the motor, most commonly a snapped cable, stripped gears, or a mechanism that's jammed and can't transfer the motor's movement to the glass.
The motor's only job is to spin, and it connects to the regulator through a small gear that engages with the regulator's own gear or cable drum. When you hear the motor running normally, it means it's getting power and spinning as it should, which rules out most electrical problems like a bad switch, a blown fuse, or a wiring issue. The disconnect happens further down the line, in the mechanical parts that are supposed to turn that spinning motion into the window actually moving up or down.
A snapped cable is one of the most common reasons for this exact symptom. Without a cable to pull it, the window has nothing connecting it to the motor's movement, so the motor spins freely and often sounds like it's working harder or making an odd whirring noise since there's no resistance from the window anymore. Stripped gears inside the regulator create a similar effect, where the motor's gear spins without properly grabbing onto a matching gear that's lost its teeth.
A jammed mechanism is a little different, since it usually means the motor is working against something rather than spinning freely. If a cable has come off its track and bunched up, or debris has gotten into the mechanism, you might hear more of a straining or clicking sound as the motor tries to move against the obstruction rather than a free-spinning whir.
If your Jeep's window motor sounds like it's running but the glass isn't moving, it's worth having the regulator checked rather than replacing the motor, since the motor itself is very likely fine. Hoover Street Auto Repair in Ann Arbor can confirm exactly what's disconnected inside the door and get your window moving again.