Thanx Ernie. Got it apart this afternoon. Found the black wire was only 1/2 on to the contact point. (thought that should be enuf) So I re-soldered it. Hooked everything back up and NOTHING not sure what I did wrong. REALLY frustrated now.

Took a break and thought just for giggles I would try my old motors (I have 2) on the bench test seeing as how I had all the wires ready for it. Hooked up the first motor and got a little spark but nothing else. the 2nd motor worked 100% Guess I didn't need to replace the last motor afterall.

So now I will put this motor into the car and check it out. BUT, before I do that, I think I will double check the wiring from the switch and relay. I posted earlier, Ernie, what my results were from testing all the wires going to the motor. (post #37) Are those results correct? If not then I have another problem and would like to fix that before I re-connect this motor.

Awaiting your reply,

shmoky

 

Now.. what I see..

You said Key on..

Key on/switch on: red #6
12V brown #5 12V
1-2-3- plug
blue 0v
Green 0V
yellow 12V

This is not correct!
you didn't say what position the switch was in when you took these readings..

But:

Key on Wiper switch on High
green 10.3
yell 12v
blue 160 millavolts.

You have o volts on green.. In either position.. Green 1.4 volts on low, and 10.3 on high...

Key on wiper switch on low.
green 1.4 v
yel 12v
blue .3 v

Again..You have o volts on green.. In either position.. Green 1.4 volts on low, and 10.3 on high...

None of these jive with what you posted.
The brown wire 5 should only have voltage when the motor is running

The yellow wire should have 12v al all times with the key on.
The washer pump wires are just jumpers from the same wires at 123
The brown wire 5 should only have voltage when the motor is running

 

OK. I didn't take any readings with the switch on high only on low or off. My first #'s you have here the switch was on low.

Obviously I have some problems here. Going to have to look VERY closely at the wiring. I know there is continuity from the switch to the motor plug wires How do I check if the Relay is actually working properly?

Also on your picture/schematics in post #15 it says to verify the wires on the main harness. Can you tell me exactly where this harness is on the car please. I can't find a plug with three wires (red, brown, black) on it.

Thanx,

shmoky

 

hate to bail on you tonight buddy.. but my eyes are killing me.. I'll look this over tomorrow.. For some reason we are getting roasted because we don't do third party shipping.

 

To test the relay.. I'd pull the cover on it first.. inspect the contacts and file if needed. You can use a point file for doing this.

To function test the relay, power up the coil side which is the two wire side. It will function in either fashion but if you want to do this the right way, the power 12 volt side is the terminal closest to the bracket (or floor). If you look at the pic above.. you'll see a small yellow dot on this terminal.

The three wire main wires I'm talking about are the three wires that you plug in to the wire motor.

should have with motor installed and working:
Key on wiper switch on low.
green 1.4 v
yel 12v
blue .3 v

You reported
blue 0v
Green 0V
yellow 12V

So.. there has to be an issue somewhere.. finding it is what will drive you crazy.

 

Not sure if it's helpful but I recently had to trace gremlins on my 68 as well. I followed the video instructions and the wiper motor worked perfectly on the bench, but behaved really strangely in the car. My issue was all down to the switch in the dashboard. I ended up taking the switch out and connecting the wires manually to test all the wiper states and they worked perfectly

I found that firstly, the switch was not grounded securely (combo of bad wiring and cracked mounting bezel) which meant that when you moved it it sometimes messed up the ground connection. Secondly I found that the plastic casing on the switch was really warped where the metal faceplate is attached and this was causing the internals to connect where they shouldn't resulting in the wipers coming on (and the washers as well) when I turned on the key, even though externally the switch looked like it was in the off position. Installing a new switch and grounding it to a good known ground (I used the clock) got everything working sweet for me.

Cheers,
Azza

 

Ernie I will be checking that relay and the wiring this morning. Will report back later today.

Thanx azza2u I will take a close look at the switch.

shmoky

 

Shmoky... no problem.. I'll be here..

 

Well shmoky, I,ve been monitoring your progress, don't let this get you down, you'll be the expert when you fix her. You got expert help w/ Willcox, please continue to post current problems, I'll revisit and coment
if I think I can be of help. Luck to you.

 

Thank you!

I wish Smoky would learn all the in's and out's of this system! It is such an odd ball system that every time we revisit this on the forum I have to go back and take a crasher coarse myself...

Everything is different on this system from the power wires to the solenoid and the way is is powered up. To complicate things... the white wire/blue wire sheath, the schematics from GM and every other one I've ever seen not having the correct wires in it.. or better yet.. wires changing color from point a to b. Thank God this was only a 1 year thing...

 

Me Too

Not much luck today. Traced all the wires from the switch and the relay via continuity and everything was okay. The only thing I can't get to YET is the solenoid on the tach. Will trace that one down on Sunday. (I'm leaving town tomorrow for the day)

Had the motor in and out 3 times today.

With the motor on the bench and running I get the following readings: Green 0.2v yellow 11.7v blue .4

When the motor is in the car as soon as I hook up the battery the motor starts pulsating. I don't have the wiper arms hooked up to the motor but the nut they attach to goes back and forth (pulses) about half an inch. With the key on and switch to low, it speeds up quite fast but even faster when the switch is put to high speed. Turn the switch off and it sounds like it parks real fast but continues to go back and forth that half inch and won't quit until I disconnect the battery.

Sorry I didn't get volt readings when it was running in the car........ Okay I'll go get them........ wait a minute
I'm back....

Key off/switch off: green pulses between .20v & .30v yellow 0v blue 0v
Key on/switch low: green .11v yel 11.7v blue .07v
Key on/switch high: green 1.25 yel 11.8v blue .06v

shmoky

PS when the motor is running on the bench the wiper drive is clockwise and when in the car it is counter clockwise. ?????????????

 

Ok.. at this time.. my advice is to stop.. we have to figure out where the wiring issue is and if you keep treating this motor like a step child he's gonna blow again.. (no offense to anyone that is a step child, just my attempt at a bad joke)...

I may be at the shop tomorrow.. and if so I'll drag out frankenmeter.. see if I can re-create this on the machine.. If not it will be monday at the earliest. Tomorrow AM I'll check over your voltages.. but again.. when testing please tell me if the switch is in high or low.

E

 

but again.. when testing please tell me if the switch is in high or low.


I thought I did

Key off/switch off: green pulses between .20v & .30v yellow 0v blue 0v
Key on/switch low: green .11v yel 11.7v blue .07v
Key on/switch high: green 1.25 yel 11.8v blue .06v

Yes I am glad I am going out of town Saturday. I need a break from this.

Thanx for your continued help. Sunday morning.

shmoky

 

yep.. you did.. as usual.. it's late.. and I'm tired....

Sorry..

 

That's what I figured Ernie. Was going to mention it but didn't. I realize you are 3 hours ahead of me so when I make an evening post I know it is almost Midnight your time..... and then you are up EARLY in the am and posting then tooo..

What is the issue or thought on the different directions on the motor? That sounds like reversed wireing doesn't it? I really don't understand electrical...... but I'm learning

cheers

shmoky

 

Oh.. that thing called sleep.. yeah.. I've got a few issues with him..

Well.. this is interesting to say the least. I don't ever remember one running backwards. I'm a bit apprehensive about putting one on the tester and trying to make this happen but they are tough cookies. I think you are getting power on a ground....

I've still not decide if I'm going to the shop today or not..

 

Thanx Ernie. I see you're up early again.

I need a break so Sunday I think I will baby my baby and give her a bath and a polish.

shmoky

 

reverse the polarity on a DC motor and it will run backwards. Not sure how it might affect the mechinical parts in the gear assemblly, you tried finding someone local with a 68?

 

Thanx dnto. Finding someone local with a 68 check out a map of where I'm at Actually I found 2 other 68's last year at a car show 60 miles away. I've met one of them before but neither one of them drive their cars. Maybe 50 miles in a couple of years ---- or less. One of them definelty doesn't pull wrenches he hires someone to. (don't know who) The other guy rarely drives his car and it just sits in his garage. Both of them had temp plates on their cars for the car show and only showed up because I hassled him until he said he would bring it down.

I re-read your posts in "68 wipers wont stop" and you say "Yes you can install the yel/blu connector backwards but I do not think thats your initial problem yellow on top blue on bottom."

I thought the yellow was on the bottom and that is how I have it wired right now. If I have this backwards what would it make it do? (Ernie?)

I will get back to this again on Wednesday and probably pull the motor again and do a bench test to make sure it okay. Also to double check the direction of the motor operation.

shmoky

PS Ernie..... get some sleep ..... don't answer this tonite
PPS have you dusted off the frankenmeter yet?

 

I was so frustrated with this problem I only cleaned the car last weekend and didn't look at it at all this week. Until this morning.

Re-hooked up everything in the car. (it was all unhooked before but motor was in the car) Double checked all the wireing and changed the 3 plug wires to correct wireing (keep getting the white(blue) and red backwards). Made sure everything was grounded and hooked up the battery.

1. Wiper motor didn't do anything with the key off--- this is a good sign.

2. Turned the key on and again nothing happening--- still a good sign.
3. Turned switch on to low and wipers went to low speed---
4. Turned switch to high speed and high speed works--
5. Turned switch to off and wipers stopped and PARKED.

Don't know what I was doing wrong before but it seems to be working fine now. I guess persistence pays off. Now I will put the dash and everything else back together and continually check the wipers to make sure they are working at each step of re-assembly.

Thanx to EVERYONE for your help and input. I couldn't have got thru this without YOUR help.

Wish me luck on my re-assembly.

shmoky

PS I guess the vaccuum for the wipers is next.



UPDATE:
Got dash back together and everything works great. Haven't started the motor so not sure if the vaccuum is up to snuff or working yet. I can always use the override for now if I have to.