71 Wiper problem.
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Joined: Sep 2013
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71 Wiper problem.
My 71 has an issue w/the windshield wipers. Do not know if I did something wrong when I replaced the radio or if something just went out. It seems that all parts are getting power, except that the washer pump motor appears burnt. Is it necessary to have a functioning washer pump motor for the wipers to operate correctly? I have replaced the switch already & just bought a new wiper motor expecting to get everything w/it. Not the case. Any advice would be greatly appreciated.
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
My 71 has an issue w/the windshield wipers. Do not know if I did something wrong when I replaced the radio or if something just went out. It seems that all parts are getting power, except that the washer pump motor appears burnt. Is it necessary to have a functioning washer pump motor for the wipers to operate correctly? I have replaced the switch already & just bought a new wiper motor expecting to get everything w/it. Not the case. Any advice would be greatly appreciated.
Have you tested the old motor or for that matter the new one? Most of the motors turned in as cores are good motors so make sure the motor is the problem first.
You said you replaced the radio... is the center dash bezel broken between the wiper plate and the lower bezel? If it is you'll need to run a jumper ground from the switch to the bezel. The wiper switch must be grounded for the system to work and breaking this tiny area between the two can cause a ground to be lost.
Wiper Motor Bench Test 69-72
Wiper Motor Wire Testing
Here is a link to all the wiper videos for the 1969-1971 on our site:
http://willcoxcorvette.com/advanced_...keywords=wiper
Here is a simplified schematic.
And lastly, here is a file that will help you diagnosis your problem.
Corvette Windshield Wiper Motor Wire Schematic 69-72 with test
Last edited by Willcox Corvette; Sep 8, 2013 at 09:57 AM.
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,847
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Yeap... run a ground to the switch and see if it works. Then if it does you'll have to run a jumper wire from the switch to the back of the small gauge bezel for a permanent fix.
