Windshield wipers not working

Tiny
MANAGERMAN
  • MEMBER
  • 2015 CHEVROLET CORVETTE
  • 6.2L
  • V8
  • 2WD
  • AUTOMATIC
  • 32,000 MILES
Hello, I am having some trouble diagnosing the non functioning windshield wipers on my car listed above z51. It has 32,000 miles and I have had zero issues. Then a couple weeks back the windshield wipers started not to work I would go for a drive and they would work and 15 minutes later they would stop working. I would reset the car by removing the negative battery cable and the wipers would come back on. A week goes by and now they do not work at all.
I took it to the local dealer and they told me the under hood fuse box needed to be replaced. The tech could push down hard on the wiper motor relay in the fuse box and the wipers would work. So he surmised that there was a problem with the circuitry in the box. The dealer wanted $780.00 to replace it. So, I ordered the part myself and replaced it today. Still no wipers working and pushing down on the relay still does get the wipers to work. I have swapped out the both wiper relays in the fuse box with new ones and still have the same problem. I was thinking it could possibly be a problem with the body control module or maybe (hopefully not the engine wiring harness). Have you run across anything like this problem before? Any advice you can give to figure out this electrical mystery? Thanks!
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Sunday, May 10th, 2020 AT 7:42 AM

3 Replies

Tiny
ASEMASTER6371
  • EXPERT
Good morning,

When they do not work, can you verify power on both sides of the fuse for the wipers?

https://www.2carpros.com/articles/how-to-check-and-replace-a-electric-power-window-motor

I attached a wiring diagram for you to view of the system.

Beyond that we will need to check the harness connections at the fuse block.

As far as the BCM, no. Pushing the relay has not effect on the BCM. This sounds like a harness issue.

https://www.2carpros.com/articles/how-to-check-wiring

Roy
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Sunday, May 10th, 2020 AT 7:56 AM
Tiny
MANAGERMAN
  • MEMBER
Hello Roy! Thank you for responding to my question.

I am embarrassed to say this since I am fairly mechanically inclined, but what is the best way to test for power on both sides of the fuse? I have a multi-meter that I can use.

I am planning to remove the fuse box again and inspect the harness connections at the fuse block. Is there anything I should be specifically looking for? I had someone ask me to inspect the "terminal tension" on the harness block that is below the fuse and relays for the wipers. So I assume this means to inspect the inside of the receptacle connections to see if somehow some may have been opened wider than they should be, therefore not allowing proper contact from the blades from the fuse block?

This problem started after I had my kooks headers installed by a local shop. They had to remove the fuse box to do that install, and after they were done is when the wiper problems began. They of course deny they did anything wrong.

In any case, thanks again, and I will continue to track down the issue with your help.

Matt
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Sunday, May 10th, 2020 AT 4:05 PM
Tiny
ASEMASTER6371
  • EXPERT
Okay, I agree. I would remove the fuse box and check the connectors at the bottom. Look for burnt, damaged or loose wires in the connectors. I think your issue is right there.

Roy
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Sunday, May 10th, 2020 AT 4:31 PM

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