[Waylander]

Do everyones lights only applies to the pro kit @ $800

The home user kit only does 3 cars @ $400

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[J.Elenbaas]

Or the amount of friends?? 

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[Waylander]

that too,

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[RDKeysor]

This regards my earlier posts regarding the failure of my intermittent and low speed wiper functions.  A used replacement switch mechanism performed exactly as the old one.  I then tried a replacement relay that also failed to solve the problem.  One curious thing with the new (well, it was used) relay.  Having failed to produce the intermittent and low speed functions, I had driven the car a few miles.  Upon restart the low speed function came on (I apparently had not turned off the wiper switch earlier) briefly. I could not replicate that with additional manipulations of the switch.  I read an account of how to reach the wiper motor, the next part of this exploration somewhere on the Forum but couldn't find it again.  Perhaps I read it on a You Tube post. In any case, what's the best way to reach the wiper motor.  I know it begins with removing the plastic shielding over that area under the hood, but then what?

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[Waylander]

That might be a clue to your issue,

 

is your ignition key on a big bunch, or has it been

 

I would put your wipers on then gently move the ignition switch about, as in slowly turn it back from run a little and move it up and down.

 

worn Ignition switches cause all sorts of strange things

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[RDKeysor]

No, I don't put any real weight on my key chain.  However, you describe exactly the issue I had with my car years ago when I had driven to Florida from my (then) Virginia home.  I was having trouble with my wipers, and when I started the car at one point I saw the wipers sort of jump. That told me the switch was a problem.  I believe my mechanic back then replaced the ignition switch.  So that kind of thing is indeed diagnostic. Thanks for the response.  As for my air bag warning, I will probably take it to Omega Motorsports here in Jacksonville.  Years ago I had the air bag out while having the speedometer repaired and apparently failed to get the air bag plug properly back in its socket or pulled it loose during the reinstallation. So it lit up.    A mechanic at Omega put the "hammer" on the system and then pulled off the air bag to expose my blunder.

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[pdxmike]

This is a real puzzle.

 

I am betting there is a loose or corroded connector somewhere - possible connecting to the wiper motor - explaining the brief reemerges of your low speed wiper function. I don't see anything in the 92 wiring diagram connecting the ignition switch and the wiper circuit. I will say though that the wiper circuit is very complex and it looks like there are many possible failure points, unfortunately.

 

I'd suggest cleaning the grounds at Group III which is on the driver's side firewall. That is where the wiper motor grounds.

 

Just to clarify - are your wipers parking correctly? Any issues with the higher speeds running slower than they should?

 

From another site, instructions on wiper motor removal. I have not done this before so usual caveats apply.

----------------------------

<p class="">Remove the plastic caps at the base of the wiper blades. Undo the wiper blade retaining nuts and take off both blades.

<p class="">Remove the wiper blade spindle retaining nuts together with the spacers underneath.

<p class="">The plastic cover for the heater fan assembly and the wiper assembly aft of the engine bay must now be removed. Note that it is stuck to the body under the windscreen with double sided tape and just pulls off.

<p class="">Remove the plastic cover of the heater fan assembly, by taking out the 8 or 10 self tappers holding it on. Once all the screws are out, the cover just pulls off.

<p class="">There are two bolts which attach the wiper assembly to the body, one is just below the wiper motor. The other is more difficult to get to and is to the right of the right hand wiper spindle. Once these are removed, unplug the wiper motor and with a little juggling the whole wiper assembly comes out (I found that I had to remove the whole assembly to gain access to the wiper motor retaining screws).

Undo the nut on the end of the wiper motor spindle together with the motor retaining screws and the motor should come off.

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[MCL968]

I also had some very weird experiences with my ignition switch (see the thread on here about it). My heater would go on and off at random times, and there were a couple of other strange symptoms. All went away with a new switch.


A bit of a PITA to change, but not nearly as bad as you might think because the switch is a separate piece of the ignition mechanism and changing it does not require getting in to the steering column or the key mechanism.

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[pdxmike]

Come to mention it - yeah - I also had some weirdness. A while back I force-locked my steering wheel before leaving on vacation - it caused the ignition switch to move out of position in the dash housing. Came back to find airbag light on! 

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[Uber968]

I've replaced the wiper motor.  The instructions provided above ring true to my memory.  It's a bit tight getting the motor in and out, but not too bad.  The only symptom I had was that the wiper speed slowed down on all settings.  It was like slow motion, regardless of the wiper speed setting.  A new motor fixed everything.  Good luck!

 

Trent

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[Roboman]

While you have the wheel off, pull the instrument cluster and do the usual maintenance on it. Light tunnels, bulbs, clean all the post contacts so your gauges will be more accurate, etc. If the odometer doesn't work now is a perfect time to change the gears too.

Good advice MCL968, thank you.  I hope in the non-too-distant future to install cruise control; I should clean up instrument cluster at the same time.

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[RDKeysor]

This continues and concludes, I hope, my blab about attempting to trouble shoot a windshield wiper system that had lost its intermittent and slow speeds. As previously recounted, I purchased a used switch component and went through the tedious of process of pulling the steering wheel, the steering column switch component, etc.  The replacement performed exactly as the original switch.  And by the way, I sent the switch back to the Porsche breaker anticipating paying the 20% restocking fee.  The company promptly put nearly  $100 in my PayPal account, apparently filed protest with eBay, which allowed it and swept the money back out of my account.  I also replaced the relay in the fuse box with the same result, no change.  Using a very nice You Tube video done by a German on a 944 with a failed wiper motor accompanied by with English captions, I next removed all of the air handling system that mounts in front of the wiper system under a plastic cover.  This include the fan motor and eventually the wiper motor with all of its mechanicals.  I anticipated opening up the electrical connection portion of the fan motor to check and possibly clean the connections.  However, with the help of a friend, we hooked a 12V connection to test each of the posts on the motor's connectors.  Since we didn't know which was which, we were flying blind, but we did have the motor running. We also hooked up multi tester to the connections on the pigtail plug from the switch on the column.  Again we didn't identify the six posts we checked, but several of them showed 12Vs when the column-mounted switch was operated through the wiper cycles.  Even though we had done nothing that I thought significant to any of this apparatus, I hung the wiper with the operating arms on the two posts that mount the wiper arms (just because it was the easy way), and retested the motor/switch that had been hooked up.  Every function worked and I have restored everything to its original position.  This isn't the first time I've taken something apart and put it back together only to find it now worked.   One addition to the German's You Tube report for those who undertake this work.  Not only  remove the top of the air handler box and the fan, but also take out six or eight more screws that holed the bottom half of the air handler.  This allows removal of the complete wiper/apparatus without struggling to remove the hidden screws that hold the motor to the wiper mechanism.  Our German friend struggled with this.  By taking out the two fixing screws he identified, the whole thing comes clear and you can invert the motor to take out those screws.  By the way, the German's motor failed because of moisture intrusion.  He cleaned it out, brushed up the the contacts in the motor gear box area, and put it back in his car. Eureka.   Finally, can anyone identify the two-inch-diameter black plastic disk that I had left over after reinstalling the wiper mechanism.  I thought it came off the points where the wiper arms mount, but our German friend describes no such part during his task and I couldn't find any way it would go on the wiper mechanism.  The part number is 944.628.339 00 and also shows the initials RGB.  It is about 5/8th" in thickness with multiple dimensions and a 3/8" (yeah, should be metric) hole in the center.  I couldn't find the piece while searching my factory 968 CD.  In fact, I couldn't find the wiper mechanism, either.  Thanks all!

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[Waylander]

That part is unique to the 968 and goes on the middle of the screen on the wiper spindle, the spindle is 10mm longer on the 968 than he 944


Thats why it does not show in Jans YouTube video

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