91 Jimmy window issues

[Zook75]

So after almost a month I got my Jimmy today. happy with it so far and if it was not for football i'd be wrenching on it now..
Anyway first issue I want to address is the rear window. It clicks when you push the switch and the key, I pulled the safety switch and jumped it and same results. I pulled the cable off of the motor and it runs as should with the key and switch.
So I hooked up a drill to the cable and it will not move so something is suck some where. I don't want to twist the cable to hard.
Little history, in the pass 14 years the truck has only had 8,000 miles put on it so its been sitting quite a bit.
So what's the first place to look?

If there is a thread that covers this please direct me to it. I've looked with no luck.