Wiper wiring

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Jun 19, 2015 | 05:10 PM

E.Murray

Thread Starter

Racer

Joined: May 2015

Posts: 474

Likes: 25

From: Springfield MO

Wiper wiring

This should be an easy one. The PO butchered the wiring on this car and I'm trying to set it to rights. For the windshield wiper motor, the wiring diagram I have shows 4 wires. I have a plug with 4 wires (not plugged into anything) right by the wiper motor. Granted, 2 of the wires are cut off... But the motor just has 2 black wires coming out (with no plug). Is the motor wrong or is the wiring diagram wrong, or am I missing something?

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Jun 19, 2015 | 05:29 PM

ddawson

Le Mans Master

Joined: Mar 2001

Posts: 5,738

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From: Lincoln, CA

What year? For a 69 the connection is were I see a missing screw.

Jun 19, 2015 | 05:33 PM

ddawson

Le Mans Master

Joined: Mar 2001

Posts: 5,738

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From: Lincoln, CA

Here is a crappy picture of mine.

Jun 19, 2015 | 05:57 PM

JC68

Racer

Joined: Nov 2014

Posts: 463

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Quote:

Originally Posted by E.Murray

From your other posts I see you list your car as a 1968. The 1968 wiper motor and wiring are unique. The picture below show what I had on my 68.

John

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Jun 19, 2015 | 05:59 PM

JC68

Racer

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One more.

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Jun 20, 2015 | 08:19 AM

Easy Mike

Team Owner

Joined: Jun 2000

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From: Southbound

Cruise-In II Veteran

Quote:

Originally Posted by E.Murray

...This should be an easy one...

Maybe, if we knew your model year.

Jun 20, 2015 | 08:32 AM

E.Murray

Thread Starter

Racer

Joined: May 2015

Posts: 474

Likes: 25

From: Springfield MO

Quote:

Originally Posted by Easy Mike

Maybe, if we knew your model year.

Oops. Very early '68 (but with hodge podge of parts...).
I'm going to sort through it today. Thanks!

Jun 20, 2015 | 08:37 AM

E.Murray

Thread Starter

Racer

Joined: May 2015

Posts: 474

Likes: 25

From: Springfield MO

Quote:

Originally Posted by JC68

From your other posts I see you list your car as a 1968. The 1968 wiper motor and wiring are unique. The picture below show what I had on my 68.

John

Yours looks like it still has 3 wires where I only have 2. Is that right?
Also, I assume the vacuum connections are for the wiper door and can be left off (all that is missing on mine).

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Jun 20, 2015 | 09:45 AM

JC68

Racer

Joined: Nov 2014

Posts: 463

Likes: 129

Quote:

Originally Posted by E.Murray

Yours looks like it still has 3 wires where I only have 2. Is that right?
Also, I assume the vacuum connections are for the wiper door and can be left off (all that is missing on mine).

I'm no wiper motor expert, but that is the original motor to the car with the 3 wires. Check to make sure you have a 1968 motor. It should be stamped 5044683 on the end cap if it is.

Yes the vacuum connections you see are for the wiper door and headlights and don't need to be in place for the motor to work.

John

Jun 20, 2015 | 07:42 PM

#10

loup68

Melting Slicks

Joined: Jan 2012

Posts: 3,039

Likes: 504

From: myrtle beach sc

Army

The differences between the 68 wiper motor wiring circuit and the 69 is mind boggling. I wanted to change mine about 35 years ago and gave up on the idea. And please be aware that the GM "electrical engineers" in all of their wisdom of wiring millions of cars beforehand, control the 68 wiper motor by disconnecting the GROUND!!! Not the hot. The 68 wiper motor is always hot, even with the key off and out of the car. Many 68's have shorted and burned up because of this. I have a disconnect switch on my battery, because of this fact. I have had my coupe for 43 years next month. Lou.

Jun 21, 2015 | 09:24 PM

#11

shmoky

Melting Slicks

Joined: Mar 2005

Posts: 2,187

Likes: 7

From: Chetwynd B.C.

Oh Boy

A '68 wiper motor

you need to contact Ernie at Willcox Corvette. Especially his video on how to bench test your motor. This test will show you if it is working properly and more important HOW it works.

I've spent many an hour working on mine.
Another member to talk to is DZRick.

found the link to the post for the bench test by Willcox Corvette

https://www.corvetteforum.com/forums...d-69-72-a.html

You WILL want to save this link for sure.

Have fun

shmoky

Jun 22, 2015 | 09:09 AM

#12

0Willcox Corvette

Former Vendor

Joined: Aug 2006

Posts: 76,656

Likes: 1,853

From: Jeffersonville Indiana 812-288-7103

St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15

Here are the video's and some really good threads on the 1968 wiper motor.

Wiper Motor Bench Test 68 Ver 1

Wiper Motor Bench Test 68 Ver 2 "Follow up"

Great threads on 68 Wiper motors can be found here:

Mister Willcox, 68 wiper motor

68 wiper problems

Corvette Wiper Switch Testing 1968-1976

Last edited by Willcox Corvette; Jun 22, 2015 at 09:13 AM.

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