has anyone ever put a wiper on the back of a sidekick?  mine gets dirty all the time and I have to squigee the window every time I back up. 

 If you remove the rear door panel you will find wiring already there. The washer provisions are also in place. The little black plastic cap above the door has hose on the inside of it. Just pop it off and install the spray nozzle. On the washer tank you already have the extra hose and wiring for the rear sprayer. Find a Trackick the same year as yours and see where the rear wiper switch is. There will already be wiring there, just get the switch.

The wiring for the rear wiper is there up to behind the right tail light.  There is no wiring from the tail light area to the rear door area (at least it wasn't there on my 95 4 door).
When you get the rear wiper, get the wiring from the wiper motor to in behind the right tail light and it should be plug and play.
I'm not sure on the washer hose being there....I haven't gotten that far with my install.
The under dash wiring for the washer/wiper switch should be there too.