Coming close to my 1969 "Corvette in a Box" complete resto. Have almost everything back together, but have been struggling with getting the wipers to work for the last several weeks.

The Willcox doc was great. Bench tested the motor - worked great. Connected the motor in the car to 12V - worked great. Rebuilt all the original switches and tested individually. Checked the motor and wiper switch grounds - all OK. Traced power thru the override switch, wiper limit switch to the motor - OK. Swapped out a new wiper switch and relay. STILL NO WIPERS!

Checked the harness at the wiper relay. Put 12V on the yellow wire and grounded the light blue wire. WIPERS WORKING! So was not getting power to the yellow wire to power the relay. Maybe a problem in the fuse panel connection? Before tearing into the fuse panel, I checked the voltage across the wiper fuse. 12V on the right, 6V(!) on the left. Huh?

So I removed a brand new 25A fuse that looked perfectly fine and tested the resistance to find that it was bad! Popped in a new fuse and - WIPERS WORKING !!!

There was absolutely no way to tell from looking at the fuse that it was bad. Must have been a bad solder joint in one end.

So what is the moral of the story?

NEVER ASSUME THAT NEW PARTS ACTUALLY WORK !!!

 

Hi Bob
Your statement is especially true for any part that is electrical, vacuum operated, or BOTH!
Now you can drive in the rain.
Regards,
Alan

 

NEVER ASSUME THAT NEW PARTS ACTUALLY WORK !!!

[/QUOTE]



That can cost you plenty of cash and an abundance of time.

 

Wilcox doc?
can someone direct me to this?
I have had my 72 coupe for about 2 months now
and the next project will be to get the wipers working.
The prev. owner said they worked a few weeks before
he sold it to me...

I changed the fuse.
Any help in attacking this would be appreciated

 

http://willcoxcorvette.com/repairand...565f77b2d74344

Link is for the entire list. You're probably going to find more than one topic you want to take a look at.

 

I'm rebuilding my engine after it died during a ~50 mile cruise with my local Corvette Club last August.

We just COULD NOT track down what made the car stop. My engine builder swore it was ignition, but the full MSD system was about 3 months old. We checked, and there was spark.

Went through 100 things, worked on it for many hours, then gave up, pulled the engine, and started tearing it down.

Turned out to be a good thing since I had numerous small issues cropping up, but the engine was still fundamentally in great shape. So I'm rebuilding a "9.5/10" LT-1 block with a bunch of new parts. If I would have driven the car for another 1000 miles, my "9.5" block would have become a "4.0/10" block if I had broken a lifter or pushrod, or any number of other things that could have happened.

I sent my complete ignition system to MSD for diagnosis. Since I would have felt stupid if it really was some little thing in their system that was messing up. They did it for free within 1 year of purchase.

MSD sent my entire system back to me 2 weeks later. The diagnosis? "Weak Coil".

This was one of their super-duper Blaster SS Coils that was, like I said, 3 months old.

Crazy.

MSD was awesome, though. New coil, new cap and rotor, and new Super Conductor wires.

Never assume that new parts actually work.

 

Don't feel bad, It took me 25 years of bringing My Vette to Mechanics who said" I know Corvette Wipers",work for a little while, nothing. I work on them a summer & WALA!!!! I get them to work!!! still working after 3 years.

Mark

 

Corvette Windshield Wiper Motor Wire Schematic 69-72 with test <--Help Guide





1968


1969-1972