Hello! I have 96 ZJ and i have problems with rear wiper. Sometimes it work great but sometimes gets stuck (blade goes to the end of window without a problem, but it wont come back)... It comes back in parking place after few hours or days (sometimes by it self, sometime by opening the trunk)... All this happens because door actuator or motor or what? i know its not a big problem, but anyway... i want to have all operating like it should

 

A short in the wiring perhaps? Causibng it to work only sometimes? I dont think that you will get many answers today. If not bump it again on the 27th or so

 

can this be caused by corrosion on the motor shaft?

 

The wiper arm? Unlikely however the wiring runs through your hatch and it would be nothing to pull that panel off and inspect.

 

If opening the liftgate sometimes helps, my bet is you have a wire nearly broken through where the harness leaves the body to enter the liftgate. The real PITA is that it's intermittent. Start by pulling the cover and make sure the plug to the motor is not corodided and it's securly connected. Next, put a multimeter to it while it's not working to see if it's the wiring or a weak motor.

 

thank you guys for replies. I will take off panel and inspect and do all what you recommended

 

problem solved!
i took wiper motor off, took it apart, cleaned from corrosion and dirt, added fresh grease, sealed and put it back - now it works even better than new one! So if you have slow moving or sticking wiper - its a corrosion on motor shaft. Do it before it stick completely and burn the wiper motor.

 

Thanks for the solution!

 

the corosin was it shorting it out or was it just making it stick?

 

there was corrosion on the shaft tunnel wall that was clamping the shaft (that goes to the wiper blade). Even, there was a noticeable sink on shaft from the movements. The plate and motor were clean... only shaft and tunnel were corroded. Also, old grease was more like plasticine than lubricant.

 

yea the one on my XJ was stuck i just said screw it haha

 

lol, better to fix it while its not too late... or you will have to spend 100$ for new motor