Rear Wiper has me baffled...

[Jimyhatt]

I have dug thorough the forums and read every post I can find about the rear wipers and still have not solved my issue...

Our LR3 is my wife's daily driver. I got in it a few weeks ago and noticed the rear wiper wasn't working. She said its been like that for a little while.... No errors, codes or anything visibly wrong. Rear spray still works fine. Front wipers work fine and in all functions. I drove around for a bit with the rear wiper lever in the "on" positions and just once it completed a slow, staggering wipe. It started and landed back in the right spot, so I think failing relay or motor. Relays all test OK, and even swapped some around (that also tested OK) and still no progress. I watch Ebay for a bit and score a factory new rear wiper motor in the box for a good price. Swap it out a few days later and no improvement. I have checked all the fuses, fuseable links and relays and all test good. I have a good ground and 12V+ at the motor but can't get a reading from the last wire, which i think is the sensor for where they wiper is on its sweep. I am at a loss and think that it might be another sensor somewhere that is malfuctioning (rear hatch?) although I dont get any messages that lead me further. Anyone have any ideas?

Thanks!

 

[remember5]

Attached is the section on wipers. OMG another extremely complicated system that includes data inputs from the rain sensor/light sensor in the windshield and the CJB for speed/braking data to slow or speed up the wipers and transmission selector input to lock out the rear wiper in reverse under certain conditions. Plus a lock out if the tailgate is open. If you don't have this section of the manual at the end is a troubleshooting section that may help. Don't start reading without alcohol.

 

[Rover Range]

Check the wiper arm retaining nut.

 

[Jimyhatt]

Thanks remember5 and River range. I wish it was as easy as the wiper nut.. the wiring diagram shows a relay in the cjb that I have not yet found. I was just going off the ones under the hood. I’ll check that and report back although it will be a few weeks as I am away from home. Thanks again!