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Wiper Relay

 
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Rasta Monsta  



Joined: 12 Jul 2006
Posts: 11733
Location: PacNW
PostPosted: Mon Sep 20, 2010 1:07 am    Post subject: Wiper Relay Reply with quote
OK, I have read a kazillion threads about wiper switch, relay, and grounding problems. Forgive my denseness, but things electrical take a long time to soak into my brain.

I just installed a new wiper switch, and the wipers are always on intermittant (in both intermittant, and OFF position). Prior to replacing the switch, it occassionally gave me random wipes.

I know I need to get under the dash with the multimeter, but I still have a quick question. . .is it POSSIBLE for a bad wiper relay to give this symptom? If so, how likely? It looks like the actual relay is operated by solid state circuitry of some kind.
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  • WeiBe (1987 924S 2.5t) - 931 S3
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Ozzie  



Joined: 12 Mar 2005
Posts: 4448
Location: Townsville, Qld. Australia
PostPosted: Mon Sep 20, 2010 7:50 am    Post subject: Reply with quote
doubt it- sounds like a wiring fault
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Rasta Monsta  



Joined: 12 Jul 2006
Posts: 11733
Location: PacNW
PostPosted: Mon Sep 20, 2010 8:09 am    Post subject: Reply with quote
So, looking at the diagram, I need to test the pin coming from the switch at "S1" - which goes br/bl at the wiring harness plug. If this pin gives ground in the off position, the switch is bad, right?
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Ozzie  



Joined: 12 Mar 2005
Posts: 4448
Location: Townsville, Qld. Australia
PostPosted: Mon Sep 20, 2010 11:34 am    Post subject: Reply with quote
I think you will find S1 is ground or live depending on switch position.

its very possible the cams in the motor are gunked up too.
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thirdgenbird  



Joined: 29 Feb 2008
Posts: 367
Location: Pella, IA USA
PostPosted: Mon Sep 27, 2010 11:34 am    Post subject: Reply with quote
mine did that when i had a bad ground.


now i have a vw relay and i dont have intermittent. just two "off" settings, slow, and fast. it was free, so i cant complain.
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