Hello, just wondering if anyone can help me with my wiring woes for the windshield wipers:

The previous owner put in a one prong pump motor. I don't know why, maybe because of the mallory distributer and electronic dist. cap possibly being larger than the original. I would like to put a three prong motor back in (thinking it would correct my problem?), but I'm not sure if it would clear the distributer cap to the firewall. Also, I don't know what the old owner had in mind as to rewiring this one prong motor. Everything is currently unplugged: the three prong harness, and three other wires that are cut and taped near the harness; two wires stem from a seperate harness (they are dark blue and yellow, the blue I believe to be from the washer motor), while a black wire is coming from the wiper motor. I'm not sure where to connect any of them. There's also another sort of "t-shaped" connecter that is unplugged, and when I re-connect it, the wiper door opens slowly (which I don't understand why?) They've been unplugged since I bought the car, going on two months now. It's got an Edelbrock intake and Edelbrock 1406 carb.

I know all of this may sound confusing, but it's the first time I've ever posted a thread on here. If anyone knows about re-wiring the wipers or retro-fitting the wiper motor to a different one to compensate for a larger distributor cap, it would be greatly appreciated. Thanks for your time!

 

The '68 assembly instruction manual (AIM) has a wiring diagram in it which will help unravel the color coding on the wires you've found.

Can't answer your question regarding whether the correct wiper motor will clear the distributor. Have you considered replacing the aftermarket distributor and going back with a stock unit?

 

I've got an electronic tach drive distributor while not a Mallory it does have a larger than stock cap. I doubt that yours is too big for the correct wiper motor.
I'd get the correct wiper motor and with the help you'll get from Willcox along with some other pretty sharp members here you should be able to figure out what you've got.



Compliments of Ernie at Willcox.





And a few pictures from my '68 that might be helpful.

The yellow and blue go to the washer pump.


The black is the ground wire and plugs into a blade type connection that mounts to one of the screws that hold the washer pump assembly on to the wiper motor.


Here are both of the 3 wire connections

 

first off thank you very much for repling. im brand new at computer talk so please bare with me. i was just hoping that changing the wiper motor to a 3 prong motor from a 1 prong motor that everything would sorta fix it self

 

It needs to be a '68 only wiper motor to work with the original wiring. I believe other motors might have 3 prongs but they are wired differently than the '68.

Willcox has a couple documents I've posted links to below. He knows these wiper systems!

http://willcoxcorvette.com/instructi...n_the_site.pdf

http://willcoxcorvette.com/instructi..._schematic.pdf

 

hereye hereye gentlemen of the corvette forum , sir easy mike, sir dzrick sir ernie, as i will be needing time to get my thoughts and a 68 specific wiper pump motor together . i will be out of contact for a short while . as for now , i bow to you gentlemen. p.s. thank god theres men like you out there. your friend tom gallucci

 

gentlemen, one more thing id like to ask , autozone has a wiper motor for 55.00 dollars with a lifetime gaurentee watta ya think. tom gallucci

 

Seems like a decent price.

 

gentlemen,begging for more help. someone has replaced the pump motor on the wiper motor its got one prong. the three prong wiper connector is either behind the washer pump , or it was removed? theres no where to plug it in is it possible its behind the newer washer pump mechinesm. and if i buy a new wiper motor would the wiper system work normaley without hooking up the washer pump and or its wiring. thats a loaded question.thanks again tom g .

 

I can tell you that the wiper motor can work without the washer pump but whether or not the new wiper motor will work depends on what was done to the original wiring to make the one you have now work. IMO it's doubtful.

I would purchase the correct wiper motor, then using the first link I posted bench test it which will verify that it will operate correctly in a '68.
Remember the '68 wiper motor is unique and if someone installed a motor from another year they had to get creative with the wiring to make it work. You have the pleasure of figuring out what they did.

I'm guessing here but the 3 prong connector you can't find is the one pictured in the last picture I posted and that switches the speed. Your going to need that. The washer pump and (it's cover which I didn't show in my pictures) is right above that connection and might be hard to see.

I was hoping Ernie was going to see this thread and hop in to straighten you out.

 

I'll be lurking here, I'm in the process of rebuilding a gutted '68 wiper system. I got a new motor from rock auto that looks good, but have not yet bench tested it. I coulda got it cheaper and shipped free from my local O'Reilly's

Good luck to you!

 

grinchia are you rebuilding the wiper motor, i see three wires coming out of the motor , one is black, which someone cut and is just laying there, the other is black with a purple line which goes into the upper part of the motor , the white crusty one goes into the 3 prong connector with two vertical,one horazontal style connector. do you know where the black wire connects to . talk to you later , tom

 

I'm not rebuilding the motor, I'm rebuilding the whole SYSTEM!. If you have a wiper door that actually opens you are already a long way ahead of me, I'm still working on that part. I bought a new motor but I have not yet installed it. I'm working on some other wiring issues at the moment. There should be a round, 2-prong (at right angles to each other), rubber-housed connector in the wiring harness near the wiper motor that connects to the wiper door limit switch (which is located on the firewall, towards the passenger side of the car from the wiper motor location). Make sure those two wires are present and connected to the limit switch, or you'll get nowhere. The black wire you are talking about is almost certainly the ground wire, I'll have to look at my new motor at home before I can tell you where it connects, but if you look at YOUR motor you can probably do that as well as I can.

 

you could get the trouble shooting guide from corvette america or zip or corvette central, one will sell it for around 10. 00 dollars . i dont have one yet... so... but you can also get the entire vacuum line system plus filters and check valves for around 94.00 dollars. im working on figuring out how to send pictures of my indivual wiring. it looks very original except they cut the solid black wire coming out of the motors plastic circular grommet , thats the 1 dont know where it goes to, plus a few more but they may be insegnifacant ? at least at this point

 

also check into willcox corvette.coms site and dig around in there . i called tommy over there, hes a nice guy . like he says , you have to email there address to talk to techs , who will most likely set you straight . as of yet i havent learned properly learned how to email. im still getting used to sending these easy ones

 

greetings gentlemen; recently i found out that the terminal board on my 68 wiper motor had been broke off when the engine had been put back in. does anyone know where one can be located, ive already called ac delco,rock auto parts and cardone. maybe i can find one off an old gm . the terminal board is the 3 prong connector on the wiper motor.

 

mine has been broken off, when engine was reinstalled. does anyone know where to buy one . already tried ac delco, a1 cardone, and rock auto. its real name is a terminal board




thanks, tom: bigears