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Wonky wipers

chris_boyle33

chris_boyle33

New member
Sorry to borrow your board, but has anyone here had intermittent problems with switching wipers on? i'd normally suspect the switch but they always switch on fine when i first start then fail after the third or fourth off/and/on.

I figure the 924 and 944 wiper switches, relays, earths etc are the same?
 
A couple of years ago had a bit of an issue with wipers moving slowly across the screen with the wiper relay clicking on and off rapidly. (1983 2.0 924)
I didn't actually do anything apart from take the plastic cowling off at the stalk area and clear out little bits of fluff.
I might also have taken the relay out, peered at it and put it back.

Seems to have done the trick [:)]
 
Ace - hope mine is solved by this!

otherwise i'll be unplugging things randomly to shake them and see if they're broken. [;)]
 
Its the switch. When I get home I will PMail you the explanation as I have had a private query from a 924 register member. The switch has an earth which drops out for intermittent wipe when you move the lever, and .... I hate keep typing intermittent. Be patient
 
haha - okay that doesn't sound too big a deal to put right. I'll start there then.

Thankos Muchos (as they do not say in Spain)

[:)]
 
Thanks for your PM John. I took the indicator and wiper columns off tonight to have a look. More impressively than this when i put them back on my wipers still worked [:D] !

I scrubbed what i could with very fine sandpaper. i presume the wiper column earths through the shiny brass ring that presses into the indicator switchgear, and somehow earths through the steering column.

If so i suspect that connection between the two stalks may have been what was failing in mine. I noticed after i removed the steering wheel the three long brass retaining screws going through the switches weren't exactly tight. The two switch columns didn't clip firmly together (just loosely - not sure if this is a fault with mine or just design - it didn't look broken).

i'm semi confident (and this is good for me) that the intermittent fault might now be sorted. I just need an April shower during a long run to find out. [&:]

Thanks everyone for the help!

Chris.

(ps - haynes / porsche / any electric diagrams. is it just me or are they all total jibberish, and not tell you where the earths are? ah well [8|])
 
If I remember correctly, the wiper circuit has it own earth incorporated into the plug, and you would expect that for reliability, for example when the column switches work loose as in your case. Whilst a pair of contacts might look closed to the naked eye, that is no guarantee that;
A: they are electrtically closed
B: they will remain closed when subjected to the bumps and jolts of modern motoring.
 
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