 | Home > Technical > Wiper issue. Fixed! |
 
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17359   
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If the problem only started at the time you overhauled all the mechanical bits, my first check would be that the park switch is operating correctly as the gear wheel in the motor gearbox rotates. If, for some reason, the plunger is not operating correctly as the cam passes, you will not get proper park operation.
Failure of the park switch, or incorrect operation of the park switch (it has mulitple contacts) can cause a range of odd symptoms, but generally if the wipers stop wherever you switch them off it suggests that the "run-to-park" contacts are not closed when the sweep is away from thepark position, and a failure to stop quickly suggests that the contacts which short out the motor winding to use back-EMF to brake the motor are not closing in the park position. You can also get truly wierd results from the intermittent with a faulty park switch since the result rather depends on the duration of the pulse that the intermittent relay sends the potor to get it started. I have even known a park switch failure which cause the wipers to run continuously when the ignition was on, and be impossible to stop. There are other components which couls cause your problems, but it seems more likely that it is something you disturbed that a completely non-related incidental fault. It is a Defender, though, so anything is possible........ |
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25th Sep 2017 9:26am |
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| DieselBeast Member Since: 27 Sep 2017 Location: UK Posts: 33 
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I remeber doing one a few years back.
This might sound like waffle, but from memory there is a white plastic 'wedge' inside the wiper motor that is to do with the park. Basically it wears and doesn't open the contects. Hopefully this is for the correct wiper motor and makes some sence. |
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27th Sep 2017 10:09pm |
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| spudfan Member Since: 10 Sep 2007 Location: Co Donegal Posts: 4646 
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Had very slow wipers on the Puma, sometimes they would only start with a hand tug. I pushed the rubber grommet type cover forward where the spindle exits the bulkhead. One of the spindles had rust on it. Some sanding with a bit of sandpaper and a squirt of WD40. I let it penetrate then switched them on. Worked O.K. I kept trying them at different speeds and adding more squirts of WD40. as they were moving. The amount of rusty WD40 running down the false vents was a sight to behold. I gave it a good wipe and added a drop of general purpose oil from an oil can. I oil them regularly now and have had no bother since 1982 88" 2.25 diesel
1992 110 200tdi csw -Zikali 2008 110 2.4 tdci csw-Zulu 2011 110 2.4 tdci csw-Masai |
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27th Sep 2017 10:51pm |
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| ian series 1 Member Since: 17 Nov 2014 Location: south Posts: 3127 
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I'm now going with a new motor!
I'm sure the problem lays with that, Dieselbeast you may be onto something there? Everything else is wired, tested, and working as it should be, The wipers did seize, which probably put considerable strain on the motor as it did not blow the fuse! New one should be here today, so hope it will cure the problem? Been a real headache this one......  80" 80" 86" 88" 90"
Wanted, Forward Control Anything considered. |
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28th Sep 2017 6:14am |
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| ian series 1 Member Since: 17 Nov 2014 Location: south Posts: 3127
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After spending some more time on this I can confirm the problem to be the motor.
I found the circlip on the gear shaft had worn away, This causes the shaft to drop back inside the motor housing, which in turn pulls the park switch contact back, so then the switch can't make contact. The answer is to pull the shaft back out, and either take the slack out with a thicker washer, or in my case use a thicker circlip. Everything back to normal, and all working a treat 
 Click image to enlarge Click image to enlarge Click image to enlarge 80" 80" 86" 88" 90" Wanted, Forward Control Anything considered. |
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20th Oct 2017 3:54pm |
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| LandRoverAnorak Member Since: 17 Jul 2011 Location: Surrey Posts: 11324
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It's nice when you can fix something rather than just buying a complete new part. Darren
110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak "You came in that thing? You're braver than I thought!" - Princess Leia |
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20th Oct 2017 3:58pm |
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| ian series 1 Member Since: 17 Nov 2014 Location: south Posts: 3127
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It was a relief to find the problem, it's been a real PITA to be honest!
 80" 80" 86" 88" 90"
Wanted, Forward Control Anything considered. |
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20th Oct 2017 4:04pm |
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| JWL Member Since: 26 Oct 2011 Location: Hereford Posts: 3443  
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I reckon that my Defender must browse forums like this when I'm not watching, Thursday evening when picking the boy up from college I noticed a couple of strange stop/starts when the wipers were on intermittant then when I went out later they wouldn't stop when they were triggered on intermittant untill I turned the ignition off. Short journeys for the next couple of days so not too much hassle. Started ringing round yesterday to try t buy one off the shelf and ended up being disappointed, none of the motor factors had one, the one I usually use for bits were having trouble getting onto the Bearmach site and others couldn't find any even by doing sross referencing to the old Mini parts. The consensus of opinion even from the auto electric factors was that I was stuck with eBay.
I had even tried the local Land Rover dealership, still waiting for the return phonecall even after a prompting call from me, they won't get a lot of trade from me in the future, as if I expected anything different but I could have been anyone who might have had a few grand burning a hole in my pocket to spend on a new Green Oval. I did get a response from another motor factors by late afternoon and there'll be one on their counter by 11am Monday, even better in that I get a bit of discount there as well through our Land Rover Club. |
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21st Oct 2017 11:18am |
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| DieselBeast Member Since: 27 Sep 2017 Location: UK Posts: 33
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Excellent work!
Nothing better than a good fix |
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23rd Oct 2017 6:05pm |
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| ian series 1 Member Since: 17 Nov 2014 Location: south Posts: 3127
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It Certainly saved a few quid!
 80" 80" 86" 88" 90"
Wanted, Forward Control Anything considered. |
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23rd Oct 2017 6:48pm |
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| JWL Member Since: 26 Oct 2011 Location: Hereford Posts: 3443
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Mine's all fixed with a new park switch. It took me longer to get to it than do the actual job
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23rd Oct 2017 7:29pm |
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| ian series 1 Member Since: 17 Nov 2014 Location: south Posts: 3127
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I'm not sure if this was a one off on my motor,
I do they all eventually wear like that? There was a good 2mm free play on the shaft, Which makes all the difference to the correct position of the park switch. It would be interesting if anyone else has ever had this problem? 80" 80" 86" 88" 90" Wanted, Forward Control Anything considered. |
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23rd Oct 2017 8:02pm |
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| capnjapseye Member Since: 21 Feb 2015 Location: Cornwall Posts: 223 
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My wipers have gone woop teets today, have started by taking the dash out, almost all the way
Gave up at tea time, so, back on it tomorrow. Yes, I know it’s New Year’s Eve, but as a serial Defender owner (no pun), what else should I do? 2015 90 Hard Top 1998 90 300Tdi - chuffed to have another one 2013 Freelander 2 - for posher trips to the shop 1996 300 Tdi 90 Hard Top - sold 19th June 2020 - miss it, loved it 2016 90 Hard Top - demolished Nov 2019 by young driver 3.5 times over the drug limit 2010 90 Hard Top - now sold Ex mil 90 - now sold |
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30th Dec 2017 7:11pm |
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| Lou Sparts Member Since: 15 Apr 2012 Location: Kent Posts: 1501 
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Had the same issue on my 300 Tdi a few years back there was free play in the shaft and the plunger was pushing the wheel away and not going in far enough to activate the park. I seem to remember bending the circling so it was dished and put it back like that as this had the effect of pulling the wheel closer to the switch as a temporary repair but can’t remember ever sorting it properly before it got stolen (the car not the wiper motor) ! 2005 Td5 90 XS
Steve |
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30th Dec 2017 7:31pm |
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