Dont know the true size of the windshield wiper in the rear of my 96 jeep cherokee

Check your manual for wiper fuse & relays location.You can inspect fuses visually...hope this helps

Check your fuse:

Junction block location-1999-04 Grand Cherokee

Inside your Jeep.

if the fuse failed then that means one of few things...

1.) motor has failed causing excessive current draw
2.) circuit has direct short to ground
3.) short to ground that caused fuse failure is now an open

you need to check for power and ground at the wiper motor

keep us posted

with the windows it obviously is something common to all four and the first item I would check is the fuse. Interior lights are controlled by the headlight switch and a worn switch can be the problem. If these are not the problem than I would want to check the wiring, specifically the ground. Ditto for the rear wiper. Fuse first. Switch second. Wiring third.

your rear wiper motor might be faulty,in the front i would check your fluid level-if it is full and you hear the pump running-check your washer lines to see if they are pinched-usually around where the hood closes

Review this documents:
- ZJ-Secc-8K-Windshield-Wiper-and-Washer-Systems (Page 7)
- ZJ-Secc-8W-Wiring-Diagrams (Page 96)

Good luck... remember rated my help!!!

The motor is worn out. Remove the wiper arm and remove the interior trim panel to gain access. Once you see it, the rest of the procedure will be self-explanatory. I hope this helps.

Motor is right behind where arm connects to it. You need to remove inner panel.

You have a motor for the front and rear washer. Check the fuses. If the intermitted wipers does not work, there is a relay under the dash near the steering colum that needs to be replaced.

Can you here the motor running? If not maybe a fuse is blown or the wiper motor is bad.
Can you move the wipers by hand? If you can then the linkage either popped off or is broken.