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> Wiper not working anymore..
TRS63
post Jun 28 2021, 10:51 PM
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Hello all,

Last night I came back home under heavy rain, and my wipers didn't work at all (IMG:style_emoticons/default/sad.gif) RainX saved me and I made it safe but I want to fix this issue !

Where do I start ? They used to work, now nothing happens, what ever the lever position (IMG:style_emoticons/default/sad.gif)

Thanks

Antoine
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wonkipop
post Jun 30 2021, 03:39 AM
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you got the fact. manual?

6 things to check.
1. earth or leads, bad connection.
2. carbon brushes worn or sluggish.
3. insufficient tension of brush springs.
4. collector contaminated.
5. wiper bearings and joints of connecting rods without grease or binding.
6. battery voltage too low.

2 & 3 mean your electric wiper motor is kaput.
if you can get hold of an electrical tester you can establish if there is power to the motor and the earth is good.

2 and 3 will result in sudden loss of function. fuel pumps go the same way.
suddenly. but wiper motors don't get anything like the use of things like fuel pumps,
so i imagine an electric wiper motor can truck on for many years.

i'm wondering if 4 is a misprint/mistranslation and they don't mean commutator.
which is the shaft on the electric motor the brushes engage with.
so 4 is also the electric motor.

5. i think you would have noticed 5 along the way beforehand.

6. doubt its 6. if everything else is turned off and the car running and you switch on wipers and they don't work its not 6.

the procedure for checking the power to the motor is in the factory manual.
group 9 electrical.

if you are not getting power to the motor the problem is somewhere else.
switch in steering column or somewhere along the way.

work out if you have defunct motor first.

if you pull the paper duct of the interior air duct you can get at all the electrical connections easily. but after that!? (IMG:style_emoticons/default/sad.gif) like you said, it gets ugly. when i was recommissioning mine i found out why my heater blower was not working. wire had come off, it was around the back. i had the fuel tank out. for some reason it was easier to reach in there and discover that with the tank out. otherwise its a real pain getting your hand in there. thank you porsche. a bit like servicing the gearbox on a panther tank.

sadly to check 2,3 and 4 you have to get motor out.
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