1970 Wiper Motor Question
Thread Starter
5th Gear
Joined: Jul 2013
Posts: 5
Likes: 0
1970 Wiper Motor Question
Hi,
I'm having problem with my wiper motor on my 70.
The light blue wire at the wiper motor tri-plug is hot when the wiper switch is turned off and the ignition is on. When I turn the switch on, the blue wire becomes a ground is this normal?
Thanks for any information or suggestions.
Jim
I'm having problem with my wiper motor on my 70.
The light blue wire at the wiper motor tri-plug is hot when the wiper switch is turned off and the ignition is on. When I turn the switch on, the blue wire becomes a ground is this normal?
Thanks for any information or suggestions.
Jim
Race Director
Joined: Apr 2011
Posts: 11,183
Likes: 3,335
From: North of Toronto - Ontario
Are you testing with a meter or test light?
The blue wire goes GND when the switch is on.
If your using a meter it will (may depending on the internal resistance of the meter) show the + voltage coming through the motor winding.
M
Wilcox has some excellent bench test videos on their site /youtube
The blue wire goes GND when the switch is on.
If your using a meter it will (may depending on the internal resistance of the meter) show the + voltage coming through the motor winding.
M
Wilcox has some excellent bench test videos on their site /youtube
Thread Starter
5th Gear
Joined: Jul 2013
Posts: 5
Likes: 0
I was using a test light when I found that the blue wire was hot while the wiper switch was in the off position. I tested my buddy's corvette today and found the same scenario, so I assume it is correct and did not cause my motor to burn out.
Have purchased new switch, tach solenoid and relay, hopefully problem should be solved.
Thank you for your help and input. I agree Wilcox has some great videos.
Have purchased new switch, tach solenoid and relay, hopefully problem should be solved.
Thank you for your help and input. I agree Wilcox has some great videos.
Former Vendor
Joined: Aug 2006
Posts: 76,656
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From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Hi,
I'm having problem with my wiper motor on my 70.
The light blue wire at the wiper motor tri-plug is hot when the wiper switch is turned off and the ignition is on. When I turn the switch on, the blue wire becomes a ground is this normal?
Thanks for any information or suggestions.
Jim
I'm having problem with my wiper motor on my 70.
The light blue wire at the wiper motor tri-plug is hot when the wiper switch is turned off and the ignition is on. When I turn the switch on, the blue wire becomes a ground is this normal?
Thanks for any information or suggestions.
Jim
Green = no voltage
Yellow = 12 volts
Blue = 12 volts
Key on Wiper switch on high
Green = 10.30 volts
Yellow = 12 volts
Blue = 160 millavolts
Key On, Wiper switch on low
Green = 1.4 volts
Yellow = 12 volts
Blue = .3 volts.
Advanced
Joined: Nov 2007
Posts: 60
Likes: 1
From: Chicago IL
Thanks
