ZJ Rear Glass won't open

[blazinid]

Ok so I've had my New to me Jeep for 2 days now. I went to open the rear glass hatch last night and can't get it to open....The rear lift opens fine. What am I missing here? The push button moves, but maybe isn't releasing all the way?

[blazinid]

well no one responded to my question so I cowboyed up and pulled the rear panel off and started testing things. First off holy crap, is there nothing that isn't electrical? I can't believe that the rear glass release button is just a switch. I figured I was mechanical. I diagnosed that I wasn't getting any power to the switch. Still haven't figured out why. No blown fuses and everything else works thats on that same circuit. There was a unused plug mounted down low next to the tailgate latch. I ran my volt meter across it and it was hot. So I just stole power from that and everything works like it should. However I can't lock the glass now. But i'm not to worried about that.

[madizell]

There is probably an interrupt switch somewhere in the original hot circuit, that keeps the glass from working under certain circumstances, like door-ajar or whatever. Since you have verified that the lift motor works, work the original hot circuit backwards toward the fuse panel.

[IllianaXJ]

It is set up so that when the rear wiper is on, the rear glass will not open. I would guess there is a fault somewhere in that circuitry.