I was in the same boat as you once. Those tailgates on a 2nd gen can cause some serious headaches
I'm not saying this IS your solution but it COULD be. And i think it could be helpfull if i share my experience.
I could not get the window up with the key but the console switch worked fine, up and down.
Wiper position wasn't the issue.
Relay wasn't faulty.
Wiring and connectors were all good.
Motor worked.
In my case, the problem was the little plastic that pops on the key cilinder. There is a VERY thin metal ring that provides the 12v connection when turned left or right. That thin metal layer was broken.
As you can see in the picture below, there is a little crack in the LEFT half of the ring. The black cutout on the RIGHT is normal.
I did a quick and dirty fix until i find a new one. It's holding up so far.
When you're at it, please clean the rail, that big spring (that's what's making the squeeking noise) and everything else. I soaked it all in WD40, let it rest for 15min, cleaned it out, did it again and greased it all with ceramic grease.
It was a 4 hour job but it was worth it.
Hope this helps.