windshield wipers won't stop 911 3.2

83stef · 04-02-2011, 11:43 PM

the windshield wipers won't stop on my 911 3.2 year : 1986

there was one month I changed the :
911-613-306-02-M78 Windshield Wiper Switch

What should I do to fix them???

thank you
stef

DRACO A5OG · DRACO A5OG's Garage

Re-Check your installation of the switch, it may have failed some how or a loose contact, maybe ground.

sc_rufctr · 04-03-2011, 01:35 AM

Check the relays. If that doesn't work >>> Smash it with a hammer...

83stef · 04:16 AM

ok thanks,
if I remove the relay 911.618.149.01
"Windshield Wiper Relay"
windshield wipers stopping but anywhere on the screen (switch position 0)
how a way to control the operation of this relay ???

sorry for my english, thanks you

sc_rufctr · 04-03-2011, 03:17 AM

I don't think it's the steering column switch. Usually when that becomes faulty nothing works.
The relay is controlled by the steering column switch.

If it's faulty inside (relay) that would explain them not switching off.

spuggy · 04-03-2011, 10:22 AM

Quote:

Originally Posted by 83stef

windshield wipers stopping but anywhere on the screen (switch position 0)

Wipers not parking is a ground problem, IIRC. The circuit remains energized after the switch is turned off for the wipers to park (or intermittent wipe to function).

I'd double-check the switch installation first - but you can check the relay easily enough by swapping in a good one from another position- like the horn, which is usually lightly-used

aualexa2 · aualexa2's Garage

Is your intermittent wiper switch turned off? There was a post here a few months ago where someone was hunting and hunting for a fix and then realized the intermittent wiper control was on.

Peter Zimmermann · 04-03-2011, 11:09 AM

Quote:

Originally Posted by aualexa2

Is your intermittent wiper switch turned off? There was a post here a few months ago where someone was hunting and hunting for a fix and then realized the intermittent wiper control was on.

Bingo.

83stef · 12:19 PM

my intermittent wiper switch turned off
well I'll buy a new relay, considering the price
... thank you all
i will back...

Wil Ferch · 04-03-2011, 04:45 PM

?... bad intermittent switch ?...maybe less cost to try first?

83stef · 04-03-2011, 11:02 PM

I controlled the intermittent switch with the ohmmeters (multimeter)
it is ok in the off position...pin 15 , 15a , 15b

position zero of wiper motor pin 53e it'ok

Outlaw_550 · 05-03-2011, 06:48 PM

I have also been experiencing this problem (windshield wipers won't stop) on my '87 Carrerra.
In March I had this show up and I assumed it was a problem within the wiper motor assembly since the self-park mechanism (switch) is built in to the wiper motor assembly. I took it out (a chore) and dismantled it. I didn't see anything wrong so I put it back together and reinstalled it. Voila, it was fixed.

Yesterday, May 2, I drove to work in the rain and the problem returned.

I really don't know what the problem is.

I looked on the forum to see if anyone else had experience with this problem.

Dutch

Outlaw_550 · 05-05-2011, 07:21 PM

No one else?

Grady Clay · 05-06-2011, 05:37 AM

This thread has an explination:
Mystery electrical component and wires -74 911

My desktop mit scanner is on the fritz.
Get one of the others on this thread to post the wiring diagram.

Many of these ground connections are at/near the cigerette lighter.

Best,
Grady

Grady Clay · 05-06-2011, 05:43 AM

Dutch (Outlaw_550),
Welcome to Pelican

You will find a lot of help here.

It may turn out that disassembling and cleaning the park contacts in the wiper assembly is the cure.
The challenge is getting everything back as original.
Lots of photos and writing down a step-by-step procedure will help you.

Again, WELCOME.

Best,
Grady

Outlaw_550 · 05-06-2011, 06:59 PM

Thanks Grady. It is great to have a forum like this for sharing information.
Dutch

Outlaw_550 · 05-10-2011, 05:06 PM

update:

I removed the windshield wiper assembly last weekend. It worked as it should out of the car so I put it back in and it has been working. Still a mystery...
Dutch

Grady Clay · 05-10-2011, 07:51 PM

Dutch,

Part of the issue is the (friction) load on the assembly.
As the system wears, the position of the park switch changes relative to where you want the wipers to park.
The ‘load’ and excess clearance then makes the switch repeat the park cycle endlessly (it doesn’t park).

Cleaning the contacts is only the first step to correcting this issue.
Eventually, the park contacts must move or the entire system updated to compensate for wear.

Best,
Grady

Outlaw_550 · 05-12-2011, 03:25 PM

update: it does look like this is in the intermittent category. I drove in the rain yesterday and everything worked fine. I found a good deal on a replacement windshield wiper motor at Zim's so now I have a backup the next time it gives me a problem.
Thanks

neejah · 09-26-2016, 11:41 AM

Just to bump an old thread - I've got a similar issue on my '87, but........it works fine with the ignition on (intermittent and the column switch), but when I start the car - the wipers run constantly.
As I said, it works as it should with the ignition switch in the on position (and parks) so I'm thinking it's not the park switch. My other thought was to check the grounds near the cigarette lighter (I cleaned the main ground point yesterday).
Just wondered if anyone else had any input? I believe the switches are ok (as it works with the ignition on), but am stumped as to why it's different when the engine is running.
Thanks
Neil