Rear Wiper & Park Position?

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TrevorG
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Rear Wiper & Park Position?

Post by TrevorG » Wed Aug 21, 2019 9:43 am

After a couple of drinks and walking home across the cow's field, it's easier to say 'Oh S**t!'



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Rear Wiper & Park Position?

Post by spegru » Thu Aug 29, 2019 7:52 pm

An Update. Wiper is now working properly. I would say 'normally but indeed what it does is very strange and a 'Dance' is probably a good description.
The insides of the motor are different to others of a similar appearance
It seems that the parking mechanism involves a reversal of motor polarity and my problem was actually due to a missing earth wire for one of the two directions - one of those cases where a back wire that was thought to be an earth, was actually a wire that *needed* to be earthed. Additional items such as boot lock solenoid and high up brake light meant that I had in fact run out of earth terminals - sorted by changing from a 4 way bullet joiner to a 6 way joiner.
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Rear Wiper & Park Position?

Post by TrevorG » Thu Aug 29, 2019 8:52 pm

Glad it's sorted. Be careful with all that grease as it might make the cover slipperier! :P



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Rear Wiper & Park Position?

Post by mark rudder » Fri Aug 30, 2019 4:16 am

Or the cow s**t bigger!
On a serious note, why is the GRP affected by the stainless steel plate?
My 6B came with a plate but I haven't mounted it yet.
I know about magnetic signs on steel doors.


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Rear Wiper & Park Position?

Post by spegru » Fri Aug 30, 2019 9:55 am

Stainless and GRP are both inert but a combo of different light exposure and dampness under the plate will certainly affect how it all looks once the plate is off

BTW I wanted to post a video of the motor park in action but the system doesnt like MP4



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Rear Wiper & Park Position?

Post by philhoward » Fri Aug 30, 2019 12:20 pm

spegru wrote:
Fri Aug 30, 2019 9:55 am
BTW I wanted to post a video of the motor park in action but the system doesnt like MP4
Sadly not - uploading to the likes of Youtube is the only way I'm aware of.


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Rear Wiper & Park Position?

Post by Steve_S » Mon Sep 02, 2019 8:24 pm

So on reading this thread I have had a look at mine not working correctly turned out the fault was a broken [rust] carbon brush spring BUT ............. in the parked position on the body the wiper wont get on to the screen it jams on the frame and when parking again the blade wont jump over the screen frame.
So am I missing something the aids the wiper over the screen frame ?
Would anybody be kind enough to video a working on so I can see the operation



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Rear Wiper & Park Position?

Post by spegru » Fri Sep 13, 2019 9:45 am

I've just uploaded a couple of videos showing what happens to the rear wiper as it parks and the motor internals as they park.
It seems that the motor actually changes direction via a reversal in polarity. A bit weird really. I wonder if any other cars have this system?
https://www.youtube.com/watch?v=HUutOjeUqpo
https://www.youtube.com/watch?v=zX4ixEOQCRw



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Rear Wiper & Park Position?

Post by Oldconn » Fri Sep 13, 2019 10:31 am

I think the idea was pinched from Jaguar. Mine works OK if I use it regularly , otherwise it needs a few sweeps before the friction discs in the motor will change position.


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Rear Wiper & Park Position?

Post by scimjim » Sun Sep 15, 2019 12:51 pm

Wiring diagram here in the how-to guides, showing the reverse to park function.


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Rear Wiper & Park Position?

Post by Roger Pennington » Fri Sep 20, 2019 4:49 pm

I've a suspicion that it may have originated as a method to park the front wipers down behind the rear edge of the bonnet (to give a sort of "semi-concealed" effect, on something fairly up-market. Jaguar is certainly a possibility?


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