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!

Rusty spindle - no wonder it seized

Rusty spindle – no wonder it seized

I can still solder, kind of!

I can still solder, kind of! resolderd the motor power connections back to the circuit board.

That plate doesnt look very conductive...

Once the circuit board is removed and the plastic housing removed you can see the back of the gear which has a brass plate, this is where the connections touch. i had to clean it and re-grease it lightly so that it would work.

The spindle after a clean

The spindle after a clean, ready to be greased up good n proper for re-instertion

Another close up of the gunky gear

Another close up of the gunky gear

Rear Wiper circuit board removed

Rear Wiper circuit board removed, good priced chicken!

Ready to unsolder the valeo rear wiper motor from the circuit board

Ready to unsolder the valeo rear wiper motor from the circuit board

As with any project, familiarise yourself with it before taking it to bits!

As with any project, familiarise yourself with it before taking it to bits! Think it used 7mm socket to remove the bolts on the unit and an 8mm one to remove the rear motor unit from the jeep

Rear wiper removed from the rear liftgate

Rear wiper removed from the rear liftgate, I didnt photograph it, but outside the jeep there is a lifty cap at the base of the wiper blade, lift this up and you will see the blade retaining nut, undo that, take the wiper blade arm off, and then under the bigger washer type nut that you will see next to the rubber gasket. once they are off you can take the wiper motor out from the inside

On the inside, theres 2 bolts and the electrical connecter attached to the wiper motor

On the inside, there’s 2 bolts and the electrical connecter attached to the wiper motor

You can see the 2 bolts middle top and bottom of the unit, 8mm socket did the trick if i remember

You can see the 2 bolts middle top and bottom of the unit, 8mm socket did the trick if i remember

Access to the jeeps rear wiper motor is via the lower half of the interior trim on the rear liftgate

Access to the jeeps rear wiper motor is via the lower half of the interior trim on the rear liftgate. These screws in the square indents are long…. power screwdrive will save a lot of time and effort

as well as the 2 screws in the indents there are 6 or 8 others dotted around the interior trim panel,

as well as the 2 screws in the indents there are 6 or 8 others dotted around the interior trim panel, just unscrew these, the panel is still held onto the door frame by plastic retainers click click when you pull them out, they should stay attached to the trim panel. ps. dont let the door fall on your head!

 

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!

Originally posted 2013-02-18 16:12:34.