Wiper Motor Wiring
Thread Starter
Racer
Joined: May 2005
Posts: 417
Likes: 0
From: Red Deer Alberta
Wiper Motor Wiring
I have discovered that I have a short in my wiring somewhere.
At the 1-2-3 connector onto the motor and at the switch there is power in the yellow wire full time and in the blue wire when the switch is on high OR low. The wiper motor and switch are new. I don't know how were to start.
At the 1-2-3 connector onto the motor and at the switch there is power in the yellow wire full time and in the blue wire when the switch is on high OR low. The wiper motor and switch are new. I don't know how were to start.
Thread Starter
Racer
Joined: May 2005
Posts: 417
Likes: 0
From: Red Deer Alberta
Grounding the blue wire at the switch kills the power on the other end at the motor. Running a ground to the motor itself makes no difference
If I leave the red/white wire plugged in by the motor it runs on high, clacking and will not shut off. I think I've also seen a small amount of smoke from the motor when the red/white wire is plugged in.
If I leave the red/white wire plugged in by the motor it runs on high, clacking and will not shut off. I think I've also seen a small amount of smoke from the motor when the red/white wire is plugged in.
Burning Brakes
Joined: Nov 2006
Posts: 893
Likes: 7
From: Orange Park Florida
Be sure the wiper ground wire (black) is a true ground. On my '72, the wiper ground comes from the starter. There have been instances where someone incorrectly connected the black wiper ground to the starter "batter/hot" wire which is also black. Not a good thing, and, it will not blow a fuse - just generate a lot of heat and battery drain.
Thread Starter
Racer
Joined: May 2005
Posts: 417
Likes: 0
From: Red Deer Alberta
Hello Alan
I have spent a lot of time watching that video, incredibly helpful but I can't understand the power in the blue wire. it's supposed to be a secondary ground, right ???
JR
I have spent a lot of time watching that video, incredibly helpful but I can't understand the power in the blue wire. it's supposed to be a secondary ground, right ???
JR
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
I have discovered that I have a short in my wiring somewhere.
At the 1-2-3 connector onto the motor and at the switch there is power in the yellow wire full time and in the blue wire when the switch is on high OR low. The wiper motor and switch are new. I don't know how were to start.
At the 1-2-3 connector onto the motor and at the switch there is power in the yellow wire full time and in the blue wire when the switch is on high OR low. The wiper motor and switch are new. I don't know how were to start.
Did you run the bench test to confirm the motor works OK ?
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
The wiper motor system is heavily dependent on Ground.
I've been fooled myself by ground so the first thing I do is run a separate ground to motor and one to the dash switch.
I would say over 50% of the time the grounds fix the problem.
Here are just a few of my temporary ground leads with a few test leads and lights.
Thread Starter
Racer
Joined: May 2005
Posts: 417
Likes: 0
From: Red Deer Alberta
I did bench test the motor step by step with the wilcox video before installation. It was new and worked fine. I installed it and it worked fine. It sat for a long while and when I tried to park the wiper motor to put the wiper arms on it didn't work at all. I got a new wiper switch and now it's not working properly.
The bypass switch when it's closed puts the motor on high. When I use the wiper switch it just adds the clacking noise. As Roger suggested I have a ground from battery to wiper switch and alternator casing to wiper motor. No change, I still have power in the blue wire and NF wipers.
JR
The bypass switch when it's closed puts the motor on high. When I use the wiper switch it just adds the clacking noise. As Roger suggested I have a ground from battery to wiper switch and alternator casing to wiper motor. No change, I still have power in the blue wire and NF wipers.
JR
