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Wiper motor is possessed - RESOLVED

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  #1  
Old 04-10-2013, 03:50 PM
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Default Wiper motor is possessed - RESOLVED

Hi folks

Been suffering weirdness with the wiper motor since taking on this car ('97 XK8 coupe) three years ago, but it has suddenly become impossible to endure. Once started, the wipers will just keep on wiping no matter what position the switch is in. It used to be that cycling the switch up and down would reset the thing, but that doesn't work any more.

When in use, they are liable to park themselves in the fully-deployed position.

Have searched here and it seems to be a known problem, but mainly with the XJ8s which may have the same motor but different electronics/relays.

I presume the problem is a microswitch within the motor. How do I remove the motor, is it the three small nuts holding it to the plate ? Or does the whole shebang have to come out of the car ?












Thanks
Frank
 
Attached Thumbnails Wiper motor is possessed - RESOLVED-img_1496_zps1e54715f.jpg   Wiper motor is possessed - RESOLVED-img_1495_zps8c9d66dc.jpg   Wiper motor is possessed - RESOLVED-img_1507_zpsa6701910.jpg   Wiper motor is possessed - RESOLVED-img_1501_zpsa363620e.jpg  
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Last edited by GGG; 04-25-2013 at 05:38 AM. Reason: Add 'RESOLVED' to thread title
  #2  
Old 04-13-2013, 12:24 PM
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Going to buy a second-hand motor and fit that, then take my original apart and see what's what. Wouldn't be surprised if it's another of those microswitches, like are in the doorlatch mechanisms
 
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Old 04-17-2013, 03:39 PM
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Haven't removed the old motor yet, but dissected the new one in case anyone is interested:

Wipers Photos by franksm | Photobucket





 
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  #4  
Old 04-17-2013, 06:57 PM
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That microswitch could be doing the 'haunting' if it's anything like the door latch equivalent.

Graham
 
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franksm (04-25-2013)
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Old 04-25-2013, 04:37 AM
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Good news - the new motor is in and is working perfectly.

The microswitch in the old motor works just fine - must be one of the diodes or the capacitors that has gone wrong. Anyway, very simple job once the wipers and plastic cover are out of the way.

The motor is held in with three 10mm bolts, and the spindle with a 13mm bolt.

The only thing I'd say is to make sure the mechanism goes onto the spindle in *exactly* the same way it came off. First time I tried the wipers, the would dip down a half inch before performing a sweep. Easily fixed, but also easily avoided by marking the bracket position on the spindle



 
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GGG (04-25-2013)
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Old 04-25-2013, 05:37 AM
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Good to hear you've got the wipers working again and excellent advice about marking the spindle positions.

I've added 'RESOLVED' to your thread title to help others looking for help with the Wiper Motor in future.

Almost tempted to take mine apart just for an excuse to buy one of those 'Irish Ratchet Spanners'.

Graham
 
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Old 04-25-2013, 05:38 AM
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heh heh
The spanner came shaped like that from the shop. Although I have bent a few in my time ;-)
 
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