Does this test prove that wiper switch is not bad?
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Joined: Jul 2001
Posts: 62
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From: Germantown, MD, USA
Car: 1989 IROC-Z
Engine: 5.7L V8
Transmission: Auto
Does this test prove that wiper switch is not bad?
I am trying to diagnose my wiper problems. They were working in high speed only. I did some tests to try and confirm whether the switch was the problem or not. I disconnected the wire connectors from the circuit cover board and wiper motor and then jumped the motor and cover board to the car battery to see if I could get the wipers to work independently of the switch. I got the high speed to work but the low speed still did not work so it was like nothing changed. Does this MOST LIKELY clear the switch as being a problem and I can now focus on the motor and circuit cover board? BTW, after the testing, now the wipers will only move a couple inches up the windshield and go back down so things got even worse!
Joined: Oct 2013
Posts: 2,612
Likes: 157
From: Louisville, KY
Car: 1983 Z28
Engine: 385 Fastburn
Transmission: T-5
Axle/Gears: BorgWarner 9-bolt posi, 3.27 gears
Re: Does this test prove that wiper switch is not bad?
Yeah, sounds like a motor issue by what you described.
Thread Starter
Junior Member

Joined: Jul 2001
Posts: 62
Likes: 0
From: Germantown, MD, USA
Car: 1989 IROC-Z
Engine: 5.7L V8
Transmission: Auto
Re: Does this test prove that wiper switch is not bad?
I am thinking the problem is in the circuit cover board. I had replaced it with a new one a while back but I may not have put in on correctly. I understand that there is a proper way to do it or it may not work the right way. I need to get more info on that....
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