OK here goes,this is for the 68-72 cars.
I bought Doc Rebuilds vacuum hose kit,and trouleshooting guide and in the troubleshooting guide it says the following.
(1)Turn the wiper switch on,rotate the wiper arm cortrol switch counter clockwise.The wiper arms should cease moving,if the arms keep moving the switch is defective.
(2) [B]Caution[B]the wiper arm control switch should never be left in the on position.If left on it will draw current from the battery even when the ignition switch is turned off.



Now my question is maybe two parts
You turn on the wiper switch,up near th top of the dash ,above the small gages.
1) If the control switch (by your knees) stops the wipers when you turn the switch,then power to the wiper is interrupted -- CORRECT ?

2) Docs paper says never leave switch in the on position,well how are the wiper arms supposed to work then,if the control switch is turned off (same as if you were changing out the rubber wiper blades-you interrupt the power to stop,then turn the power back on.

What am I missing here?

In testing the wiper arm control switch which tested ok,then bad,I pulled it apart and see the little plastic innards (slpines) seemed to be stripped from he part that you twist to turn wiper arms on and off,used hot melt glue try to fix it,seems ok so far.After messing with it for over an hour.I think people don't realize that it is supposed to turn no more that 1/4 turn or so ,and then back the opposite direction no more then 1/4 turn.I am betting a lot of people have twisted and twisted that **** and have broken it.
Any directions in the owners manual on how this **** is supposed
to work.I think a regular toggle switch would work better as far as I can see since you are just turning power on and off. Any Input ??

 

Hi 71c,
Here's the quote from the 71 owner's manual.
"Turn the wipers on. Rotate the wiper SERVICE OVER-RIDE SWITCH CONTROL CLOCKWISE to stop the wiper blades on the windshield. Replace the blades or perform service required, then return the control **** to the off position".
The switch above the gauge cluster turns the wipers on and off. The over-ride switch only interrupts the power to the wiper motor when it (the switch) is turned clockwise. The dash switch can return the wipers to 'park' only after the over-ride switch is turned COUNTER clockwise.
Nice!
Regards,
Alan

 

I believe Doc was referring to 68s . On 68s the switch interrupts the ground. The way the 68 is wired this creates a drain ,supposedly.
The way the 69s and newer are wired the switch interrupts the power ,I don't see drain being an issue.

edit- Leave the switch in the "RUN" position.

 

Hi Roger,
I think the same thing you do. I remembered something about the ground but I wasn't sure.
Thanks for remembering.
Regards,
Alan

 

Alan the 68 is an SOB unlike your 71. The switch removes the ground from an internal part of the wiper motor not the actual motor case ground-this is where I get lost and someone like Willcox will have to explain further.

The switch on the 69 and up is simple,it just kills the main power to the motor just like the wiper door override pushbutton switch. In fact the 2 switches are in series and if either one is "open" the motor stops.
Roger

 

The switch by my knee is wired with two red wires,one has power ,the other side ( if switch is on) has power,turn **** and power stops going thru switch,which stops wipers.So I guess its correct to leave the power on.

now to get the wipers to run.always something.

 

The 68 swicth grounds the wiper motor. There should be one wire that goes to the switch. When you turn the switch it gounds that wire out and the wipers work. The switch grounds though the case to the mounting bracket.

 

71... I've read this but what is the problem with the car? I assume the motor is not working and you're looking for the cause.

Go upload this... it's free.... http://willcoxcorvette.com/repairand...elp.php?hID=95

The wiper switch under the dash interrupts the power on the red wire with a white stripe... this runs from the over-ride switch to the limit switch and then to the motor. This switch had one purpose and that was to stop power to the motor so that you could change your wiper blades.



This switch can be tested very easy by running a continuity test in the on (closed) and off (open) positions. Leaving this switch in the on position will not cause a battery drain on the car if everything is working properly.

But... what problem are you having? Post this and we'll figure it out..

Willcox

 

Willcox,

I am just checking out item by item what is working and what is not,I have pulled apart the wiper door,it's off the car at present.I had wanted a tilt column for awhile and found one a year or so ago,just got it installed with a Zora steering wheel.While I was under the dash I started checking the over-ride switches they seem alright,one is new one is old.Then on to the wiper arm control,switch is now working after I disassembled it and found the problem.What a pain that was.

I remember seeing on utube that someone was showing/testing the wiper motors,I better look that up again,since I am not very good with wiring,kinda need to be led step by step on that stuff.
After reading Docs paper and looking inside the switch and asking on the forum I figured he was wrong,so now that is two sources I will not be buying anymore parts from.If ya all can't give correct information out in your literature and it causes me to waste my valueable time you have lost a customer.
END OF THE STORY
Willcox, just who am I dealing with on this forum ? your name
I appreciate the information,having girlfriend print it before she comes home from work,will take a peek at it tomorrow.

Thanks for all of the replies,I will be sorting it out,will just take some time.

 

I think this is the video you might be looking for.

1969-1972


Willcox

 

Out working on it now to see if it runs like it is suppoded to.

 

You never said what the motor was doing? Is it clicking? Is it just not working? Running all the time?

If you do power up the motor and leave it on the car.. always make sure to remove all.... and I do mean all wires from the motor and run temp wires for each one. Make sure the wiper door is open and make sure you either disconnect the wiper arms or you spritz the windshield with some water.

Willcox

 

Ha HA HA HA it's doing nothing NOW
I could not get it to go to a slow cycle speed it seemed to be consistently inconsistent,then I had the on/off switch out of the dash and it gave me a good shock,enough to make me not touch it again
then I fixed it

Didn't know these would bleed,learn something everyday

 

You shocked yourself because the switch wasn't grounded , hurts don't it ?

 

Well it's certainly not going to run in that condition Kinda hard to do testing too..

Is that where you are at with this project now.

 

This where I am as of 9/25/2010 at 1:11 central time,just cleaning up parts ,getting coffee table cleaned off for some test fitting before I add grease back into the equation.

Are all these parts inside alailable if I break something?

Did find my service manuals and they have pretty good picslets see if i can get this thing back together and then see if it will run.

 

Nope.. the parts are not sold separately!