Wiper switch question
Team Owner
Joined: Jul 2006
Posts: 22,157
Likes: 4,168
From: Kannapolis NC
I don't have a diagram for a 76, but I don't think any have 12v feed. I think the motor is always hot and the switch provides a ground (or two grounds for slow speed). I'd go to Willcox's site and look up the wiring diagram under their tech and help section.
Team Owner
Joined: Jul 2006
Posts: 22,157
Likes: 4,168
From: Kannapolis NC
Here you go, scroll down to the 73-82 diagram showing which contacts to ground to bench test your motor. Pins 1 and 3 go to the wiper switch and if you ground pin 3 the motor will run one speed and ground 1 and 3 it will run the other. That's what the switch in the dash does. I found out the hard way that if that switch ( and the plate it mounts to) isn't grounded, the wipers won't work. My fix was to run a jumper from the mounting plate (dash plate) that the switch is bolted to down to a good ground. If you're trying to test the switch with the case of the wiper switch not grounded, it won't work.
http://repairs.willcoxcorvette.com/category/wiper/
http://repairs.willcoxcorvette.com/category/wiper/
Last edited by 65GGvert; Jan 30, 2016 at 07:11 AM.
