C3 Corvette Windshield Wiper Repair, Testing & Troubleshooting the Entire Electrical Wiper System 

Hey Mike, your video helped me with my wiper issue. I had seen several other videos but were NOT as helpful and detailed as yours, kudos to you. My problem ended up being the ground wire on the tach was disconnected. I tested the wiring, the motor fuses and all were good. But following your methods helped. Many thanks and keep up the great videos. Cheers 🍻 Frank

This guy is a GENIUS in my book. How anyone can keep all that electrical info straight is beyond me. This is a fantastic video for the people who are able to do this sort of thing. Great job...no...awesome job...smartest guy on youtube!!

Thank you sir !! beautifully, logically explained, I'm now ready to tackle my '68 system.

I was dreading having to figure my wiper problem out, or paying to have it fixed.- The cowl opens, but the wipers don't function. Now that I understand how the system works, I feel confident in trouble-shooting and fixing this myself. Great video and explanations of all the functions.

so complicated a system for a basic function. looks like I'm going under the dash! thanks again

Another great full explanation. Restoring my 69 and this video will greatly help. Please keep them coming!

Cool about the headlight cleaning!!

Best regards from Polen for this movie 👍

Something else to check. If the pump is not shutting off after one rotation, check or replace the nylon wheel. The ridges wear down and wont direct the small arm riding the wheel and after the rotation wont go back into the lock position. I learned that and it took hours to figure out after dissecting about everything in there but that. If you have gone that far to take the motor out and apart, don't forget to also check that the nylon wheels ridges are not to worn down. Actually you can do this without removing the entire motor by taking the covers off. Luckily, I found another GM wiper motor a friend removed and replaced on a car and kept the old one sitting in his shop for years. Did not fit or mount on my 69 vette, made for a different car and year, but what it did have was the same nylon wheel and it fit perfect on mine. That at least solved the pump issue. I eventually just gave up on the whole motor a few years later and all the little problems it had and got a new one, a bit pricey for sure. Solved all the issues. Sometimes it just pays to realize and admit something is just worn out and get rid of the headache.

Great video on how this whole system works. On mine the metal grabber is not moving back and forward at all, even with the wiper working fine, so I am guessing something has broken off inside it and I will need to remove the whole thing to check it. Thanks for putting this out there.

Great tutorial!

Also , i got lucky that the solenoid switch is in good working order ,as they discontinued manufacturing it, according to Corvette Central in Michigan.

I have watched your video and love the detail. I have no power under the hood nor at the wiper switch on my 1971. The fust has power on both sides. I am not sure what year vehicle your video is on and wonder if it is the same for a 71. Using my inspection camera I do not see a solenoid on the back of my tach. Do you know if it is in a different location on a 71 or am just missing it. The issue started when I removed the factory radio and had it upgraded and reinstalled. Thanks

Hi Mike - great video. Question: my door safety switch appears to be functioning, but I’m not getting 12v from the horizontal pin inside of the plug. Fuse is good - any ideas?

Mike, I have checked the fuse and it good. If I am not getting to 1968 corvette wiper door solenoid switch (2min 53 seconds on the video) what would be my issue? Thanks

Hey Mike, my wiper problem is that i do not get 12 volts to the plug right after the switch that is activated by the wiper door, i am talking about the red wires with the white stripe. I open the wiper door manually to activate the switch but no voltage. Wiper switch is good, fuses are good, everything is ok but still no 12 volts. Any suggestions? Frank

Great job! Very informative. My problem on my 71 is that when switching on wipers, wiper door will not open. Nothing happens, but if I use the override switch to open wiper door, it opens and wipers work. I am at a loss. Any suggestions? Thanks Frank C.

Great video. I am not getting 12 volts on both pins at the solenoid. Just the one side that goes to the fuse. I believe the blue wire is the one not getting 12V though on my car this wire is black. So when everything is hooked up, the door opens and stays open. Any suggestion?

Hey Mike, great video. Im trying to fix my wipers at the moment. My problem is that I don’t have any ground to the blue cable into the motor. Do you think that could be the control switch inside the car? I was hoping I would not have to take it apart. Also, my pump was stuck and I’ve cleaned it up and lubricated, but the sliding lever that moves the pump piston seems to be very tight and takes a fair bit of force to move back and forth with your fingers. Is that normal?

On my 71, when I switch the wipers on, nothing happens. But when I use the override switch to open the wiper door, then the wipers work. The wiper switch has no affect on the wiper door. I am confused. Any suggestions? Thanks Frank

quick question. what is the round knob's function between the override pull out switches?

What makes the wiper door close?....mine stays open

Hi Mike, I have a '72 and I am having a wiper door mystery. I sent you an email, I hope you can help.