I can't hear the motor running so I assumed that it was bad. So I should be able to pull the window up by hand?
Not without disengaging the gear from the motor. It could be the motor, but it is most likely the wiring. I assume you've checked all the fuses. Next step would be to try the tailgate switch to eliminate a bad in-dash switch being the culprit. If that's not it there's two ways to go. Check the wiring back as far as you can go with a multimeter, or go straight to removing the glass to get at the motor.
To get the window out you have to cut the rivets out that hold it to the regulators so you can remove the glass. Then start checking the wiring inside the tailgate, or use a 12v power supply on the motor to see if it turns. IF YOU REMOVE THE MOTOR BE CAREFUL!! The arms in there are spring loaded and quite powerful. If you don't brace them before you disengage the gear there's a very good chance you'll hurt yourself. If I remember correctly, they spring down so you may be ok. Just be sure to check which direction the spring goes before detaching the motor.
To put the glass back in properly though, you'll need a fairly large rivet gun. If you don't have one you may be able to find a local mechanic that will drive the rivets for you for free if you get everything ready to go back in. There's other ways to do it (smaller rivets and washers), but I like to put things back together the way they were.
brad