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Wipers Inop?

scam75

scam75

Well-known member
Morning all

The wipers are lifeless on my cab. So we're the indicators when I got it so I purchased a new column stalk. Fitted it yesterday and still nothing. So had a play with the flasher relay and the indicators now work, but still no wipers. I checked the 30 amp fuse and it's fine. Couldn't find a relay in the fuse box? Where is the relay and what else should I check?

Thanks in advance

Stuart
 
Ok. That one says wiper delay? Does it also do the wipers? Will swap it out for the good one in my turbo before I order a wiper motor off eBay.

Cheers

Stuart
 
That agrees with my research today! I have ordered a motor and frame off eBay for 30 quid delivered. That should do the trick. Once off I'll try and fix the old motor at my leisure, won't do any harm having a spare. Probably rusty inside preventing it turning.

Cheers

Stuart
 
Would be interested to hear how you get on with replacing the motor, as as far as I have noticed the complete blower box needs to come out to remove the wiper motor + mechanism together.

On the topic of problems with wipers, anyone knows what could cause the intermittent function to not operate the wipers at all?
 
Seen a video of it done on an LHD, just the top cover off the blower box was removed. No idea if RHD is different!

Stuart
 
It's a whole load easier if you remove the bonnet. It makes it easier to wiggle the blower out.
 
ORIGINAL: scam75
Seen a video of it done on an LHD, just the top cover off the blower box was removed.
Click to expand...

Yes sorry, I meant just the cover, not the whole box.

The bolts holding the cover, especially the rear ones, are often very rusty, and removing the cover can be a pain.
 
ORIGINAL: TTM



On the topic of problems with wipers, anyone knows what could cause the intermittent function to not operate the wipers at all?
Click to expand...

Isn't there a separate delay relay for this function? -probably a dry joint in it -had to buy 2nd hand for the 924S as no longer available new last time I asked.
 
before replacing the wiper motor assembly why not clean the earthing point and use a multimeter to check if you have 12v+ supply at the wiper motor.

From memory the earthing point for the motor is No7 in the Haynes manual ( MP11 in the Porsche workshop manual) is located on the bulkhead near the fuse/relay box (brown wires)

To test to see if the earth for the wiper motor is the problem you could connect a jump lead, from the negative battery terminal, to the body of the wiper motor.

Use the other jump lead from the positive battery terminal and run it to the positive wiper motor terminal . If the motor runs then the problem lies with the relay switching circuit and not the wiper motor.

 
I'd also be very interested to hear how you get on if you have a go at replacing the motor assembly. Mine has an intermittent problem where it makes a hellish screeeeetching for the first several wipes. I think the wipers also move slowly when making noise (or it might just be that it seems like it because the noise its that bad). It started doing this years ago, then mysteriously stopped. Always gets better with use but since I tend to use my car on dry days it happens more often than not when I do use the wipers.
 

ORIGINAL: peanut

before replacing the wiper motor assembly why not clean the earthing point and use a multimeter to check if you have 12v+ supply at the wiper motor.

From memory the earthing point for the motor is No7 in the Haynes manual ( MP11 in the Porsche workshop manual) is located on the bulkhead near the fuse/relay box (brown wires)

To test to see if the earth for the wiper motor is the problem you could connect a jump lead, from the negative battery terminal, to the body of the wiper motor.

Use the other jump lead from the positive battery terminal and run it to the positive wiper motor terminal . If the motor runs then the problem lies with the relay switching circuit and not the wiper motor.
Click to expand...

The earth is right next to the motor, unless that is a secondary earth? Car is in the paint shop just now, I shall have a play with my multi meter at the weekend. In any case I have got a 2nd hand motor and frame on its way to me. I will simply plug that in at the multi plug and see if it works. If not I'm chasing a wiring problem and have a spare working motor!

Stuart
 
strip and rebuild the motor, the bearing is about £2.50 (6000Z) for the bottom and a good clean up and clean out the segments of the armature normally resolves the noise and makes it nice and quiet.
 
Ok got this sorted today. Got a 2nd hand working motor still on a frame. Plugged it in, it worked, so knew my motor was caput. Opted to remove old motor and frame together. This was eventually done without disturbing the blower motor! Tight and tricky but do-able. If you pop the linkage rod off the n/s wiper pivot you then have just enough room to persuade the whole lot out in one piece. There will be swearing and minor injuries however! Refitting can be done on same principle, then connect the linkage rod back on once in situ. Had a chance to clear out years of crud from around the blower motor and then tidy up and refit and reseal the scuttle cover. Job took ages but this was mainly due to the 22 mm nut that locks on to the spline on the n/s side spindle disintegrating completely. Well the nut was ok but there was a horrible mess of ex spindle wedged solid making it entirely useless! At this point I'll save you time if you need this nut in future, just order it from Porsche and finish the job 2 days later! Was at every nut seller in town and various garages and scrappies. No joy. Ended up putting nut in a vice and chiselling out the debris which in turn un rounded the nut. Much more swearing and eventually got the nut useable, in shape and on the car! Argh, nothing ever easy!

Stuart
 
Thank you for the update Stuart - will have a go at mine when I get it back from the body shop. I did try to remove the whole assembly once before but gave up when it looked as though I'd have to take the whole heater matrix off.
 
Yes, thanks for the update. A this point I struggle to see how to remove the motor by its own but I suppose it will become obvious after a few cuts in my hands and a lot of swearing... Don't we love these cars? [:)]
 
Indeed Thom! I really had no option as at least 4 screws on the blower cover were corroded beyond recognition so my easiest option was leaving the blower motor cover on and "convincing" the frame and motor to come out. As I said popping off the n/s linkage rod does allow it to be persuaded out although admittedly my blower motor cover got a bit scuffed and a bit of leverage of this and that was needed!

Stuart
 
Just a question though - how much, if any, did you need to "bend" the frame below the windshield through which the wiper pivot goes?
 
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