Help with Rear Wiper motor and jet issues - Defender Source
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  #1  
Old April 30th, 2012, 04:09 PM
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Help with Rear Wiper motor and jet issues

I solve one problem (prior post about ignition) then another one pops up!

The rear wiper motor is not working and the rear washer jet is not spitting out water. Its a 1997 NAS 90 SW.

As far as the rear wiper motor goes, it's getting current (green wire). The green wire is in the clip that attached to the rear motor. Whether I activate the rear wiper motor button on the dash or not, the green wire has power has current. Does this sound right? There are two more wires in the clip that attaches the wires to the motor and nther showing any current whether I push the rear wiper button or not. Any suggestions? Any way to verify if the motor is shot? I certainly don't want to buy one unless I can verify it's the cause.

The rear jet above the rear SW door: When I push the rear wash button on the dash, I hear the motor but no fluid comes out of the rear jet. I checked the pin holes on the jets and cleaned them out but nothing. I read that the hose can be kinked but I cannot locate where that hose is. I realize it travels under the headlining above the rear door then where does it go? Any ideas on where I should look to see the hose? I am hoping I can see if fluid is in the lines and trace the problem to the source.
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  #2  
Old April 30th, 2012, 04:34 PM
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Trevor Griffiths
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I'm going to throw this one out there: the RRC wouldn't operate the rear wiper if the door was open- lift up tailgate, you wouldn't want the wiper working. And, I think I have a motor I could send you to test
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Old April 30th, 2012, 04:36 PM
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Jason England
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on the 95 it has 2 pumps and you can swap the tubes over ... that way you can see if the issue is the pump or the tube ...
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  #4  
Old April 30th, 2012, 04:36 PM
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mark kellgren
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check your switch. the constant ignition power to the rear motor is the parking return. that brings the wiper back to park after the juice from the wiper switch is shut off. sounds like you have lost power to your switch, which provides power to the wiper pump and the rear wiper motor.
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  #5  
Old May 1st, 2012, 02:29 PM
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Ok...

Thanks for the help guys. I am going to start off evaluating the switch, swap the tubes on the pumps, then, if all else fails, I may have to take Roverlab up on his offer. I will let you know
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  #6  
Old May 14th, 2012, 07:33 PM
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Latest on Rear Wiper

Wasn't able to swap hoses with the pumps but popped my rear trim panels and pulled the dash to see the rear washer hose. When pressing the rear washer switch, the motor activates and the washer fluid can be seen rising in the tube (A-Post / driver's side of windscreen). However, the fluid travels up the tube and stops half-way up on its way to the roof. I went to the rear and removed the nozzle thinking there was air in there or something....same result when pressing the switch. Any ideas? I followed the hose up the A-post and into the headliner above the driver's side door...the hose seems loose enough to rule out a kink. As it comes out of the rear headliner it appears fairly loose enough too.

The pump SOUNDS strong but does that mean its good 2 go?

Also, the wiper switch and rear washer switches are lighting up the tester when pushed but the rear wiper motor still shows no sign of life.
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  #7  
Old March 18th, 2015, 11:09 PM
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Shawn Palmer
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Very old post, but I can help anyone it the future that comes across this post. There is a small check valve above the middle of the drivers door frame, located above the headliner. This little check valve will dry out (allow air in the line) and cause this issue. I found this while taking out my headliner.

Ordered a new check valve and it works again. Hope this helps someone.

All doors need to be shut for the wiper arm to start.


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  #8  
Old March 18th, 2015, 11:48 PM
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The fluid circuit to the rear "squirter" passes by the drivers seat on the '97 above the headliner.
In that area there is also a one way valve to prevent the fluid from draining back to the reservoir. They fail.
When mine failed at night & I had unknown to me turned it on (and soaked my pants). So fluid is probably stopping there or draining down behind the headliner.
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