Jebbysan

According to this video.....if the blue wire is disconnected and it does not park.....then the motor is bad.


So guess I answered my question......another $100!!!!

Thanks all for bearing with me....

Jebby

D_Williams

Is the motor clicking with the blue wire disconnected?

Jebbysan

No...it is a 72'
And it is not shorted....I checked that too.....

Jebby

D_Williams

What happens when you have both sides of the three prong connector grounded? (1 and 3 in this diagram)




Does the motor run slower?

Jebbysan

BTW.....I tested the relay off car to this schematic....and all is good there.....
Crazy thing is that when you put the switch to low with all hooked up...it goes slow.....high goes high.....but off on the switch ALSO goes to high.

Jebby

D_Williams

What do you mean when "it goes slow"? The motor itself or the signal(s) coming from the switch/relay?

Jebbysan

The motor...it has low and high like normal. Turn switch off and it goes back to high.

Jebby

D_Williams

'High speed' and 'off' from the switch should ground connections 1 and 3 (from the wiring diagram) on the motor separately. Does the motor still do this when you apply 12V to connection 2 and ground 1 and 3 manually?

Jebbysan

Motor stays the same speed and one wire starts getting hot.....think we are on to something?
It starts smoking too.....

Jebby

D_Williams

Then I'd say your issue is the motor. I haven't tried rebuilding a motor, but I'm guessing that something is shorting inside.

What's weird is that you're still getting low speed with both 1 and 3 grounded and that it will park with power taken off connection 2

Jebbysan

It does not park with yellow wire off...it just does not respond.....sorry if I cornfused you.....
It does park when wipers are running and turn ignition off.....

I would say it is the motor as well.....
I ordered one once from O'Reilley on a whim.....$50.....but it was not as nice to look at as I liked so did not buy it.....
I am going to remove the motor and do one more bench test to confirm...barring that...I will get a new one.
Thank you so much D for sticking with me today.....you were the other half of my brain on this one.....
In case you have not seen my thread.......here are some pics....




Jebby

0Willcox Corvette

I'm lost.......... Jebby..

I didn't read all of this because the original post was for a 1969-1972 motor and then somehow we got switched to a 1968 which is a entirely different system. You can't use the 69-72 video for a 1968. I have two videos on the 1968 motor that may help you though... And because its an old thread it didn't even show up for me when you revived it (It's always good to start a new thread vs. popping up on an old one).

So.. to save me all the reading.. what is your motor doing or what problem is there.

Did you use the 68 bench test video to test your motor? If so, did it pass or fail..
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

And lastly.. Have you looked at this from our site?
1968 Corvette Wiper Motor Testing and Schematic 68 Only Revised 03-2012

Willcox

Jebbysan

Ugh...long day and I should pay attention more.....
The one schematic I realized I posted is for a 68.....
I watched your vid....(not sure which one now) where you bench test the motor.....I attempted to do this on the car.

My problem is that:
The wipers do not shut off via switch. (No shut off, nor park)
Relay tests ok.
If you turn the override off...of course it kills it.
If the wipers are left running with the key on....and then you shut the key off....they park.
The wipers will not park with the wiper switch in off position...grounded...as I have everything apart.

Sorry for the cornfusion....I was doing the blower motor too....which ended up being a ground (which is tied in with the wiper)

Thank you Tommy.

Jebby

D_Williams

Willcox, I think he posted the 68 diagram by accident, he has a 72 motor.

Jebby, I'm still confused why the motor parks when you turn the key off but not when you remove power from the yellow wire. That wire should be the only difference between key on and key off if I'm not mistaken

Jebbysan

I am as baffled as you....makes zero sense.

Jebby

0Willcox Corvette

Jebb-

Lets start with the basic's on this.

Verify the motor is good or bad before you test or tear into anything else.

Un-plug everything from the wiper motor (including the ground lug)...

Then run power to the 2 terminal, a ground to the case and two jumpers to the 1 and 3... Disconnect the bell crank nut and linkage from the motor... then do the bench test just like in the video. This will tell you instantly if the motor is the issue. Once you do this then we'll move forward.

Ernie

Jebbysan

I will post my findings when I know more......
Thanks for all of the help.

Jebby

D_Williams

Just something I noticed...

IF your motor checks out good according to Willcox's bench test, you might try testing the wiper switch again.

It looks like, from the wiring diagram and the test video, that if the switch is providing ground to the blue wire and not to the black/white wire in the off position, then turning the key off would give you the behavior you described (the relay would switch the green wire to ground AND the yellow wire would lose power).

Jebbysan

I wanted to update this as I am twice as frustrated as I was.......
The motor I determined was bad.....so I purchased a brand new Lectra-motive motor. It worked exactly twice before it started doing what the original motor did.
What it does now:
Only way for it to work is with override under steering wheel.
It will operate the wipers.....but cut it and they will not park.....until.....you turn the key to off position.
Will not work via switch.

I believe the crap wipers that are on it did not allow either unit to park the wipers correctly and smoked out the parking circuit.

Any thoughts from anyone here are appreciated......

Jebby