When I bought my Jeep Grand Cherokee 1996, the Limited 4.0 Straight six version, my rear wiper motor never worked. It’s not a problem during the drier weather, but when its raining and snowing and the roads have been gritted the rear liftgate glass gets dirty very quickly. I set about searching jeep forums for a solution and found out its quite a common problem. I followed the step by step guidelines from the forum here. There’s no point writing it all out when this guy has done it so well! I will however, put my photo’s up to show the difference in the state of the rear wiper motor shaft and spindle. That guy used a normal claw hammer to tap the spindle with the gear on it out of the shaft. I had to hold the motor body in a vice and use a medium sized mallet to get enough force to ease the spindle out, 0.5mm at a time. The only down side with that was that i mashed the top thread for the wiper blade retaining nut. So I filed the top thread off completely and then used a mahoosive wrench to get that nut back on. I should hope I don’t have to take that nut off again! Heres The photos of my jeep rear wiper motor before, during and after, taking it out and fixing the seized spindle. It’s also worth noting that before I tried this i replaced the fuse, its a yellow one, after i replaced the fuse i could hear the motor “click”, so I knew it was alive…it just needed an extra bit of tlc to get working!
This is how I did it. It might be right, it might be wrong, but the rear wiper wasn’t working and now it is. If you attempt to fix it yourself that’s entirely up to you! I’m no expert and this article is purely for interest/entertainment and isn’t intended to be a guide so you can’t blame anything on me if it goes wrong. Anyway the photos are in reverse order just to confuse you anyway! ps. lots and lots of WD-40 and grease was used in the dismantling and putting back together! Lube lube lube!