68 wiring problem
Thread Starter
Drifting
Joined: Jan 2014
Posts: 1,866
Likes: 140
From: Sadieville Kentucky
68 wiring problem
I have been straightening the wiring behind the gauges and have a 2pin female connector with a black and a brown wire anyone know where it might go ?
thanks
thanks
Burning Brakes
Joined: Aug 2002
Posts: 1,190
Likes: 56
From: Milan Indiana
68
I had to re do the wiring on my 68 also and got lots of help here on the forum. I also have the 2 pin loose and was told it was for an accessory that I do not have- everything works on gauge area so I assume that to be true. Amazing how the 68 is different than any other Corvette I've had. Yesterday, I found a loose wire under the hood near the wiper motor that acts as a ground for the horn but attaches to one of the studs for the wiper motor??? Good luck
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,847
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
The wire Newt is talking about would be the wiper over-ride lamp. but this was a single black wire with a socket on the end of it. It operated the over-ride warning lamp in the dash by picking up power on the black wire when the motor is in the over-ride position.
Possibly the Tach solenoid connector on the back of the tachometer.
With this unplugged the wipers wouldn't work unless it's been by-passed.
Does the connector look like this? Do the wipers work?
Possibly the Tach solenoid connector on the back of the tachometer.
With this unplugged the wipers wouldn't work unless it's been by-passed.
Does the connector look like this? Do the wipers work?
Last edited by Willcox Corvette; Aug 19, 2014 at 10:00 AM.
Thread Starter
Drifting
Joined: Jan 2014
Posts: 1,866
Likes: 140
From: Sadieville Kentucky
The wire Newt is talking about would be the wiper over-ride lamp. but this was a single black wire with a socket on the end of it. It operated the over-ride warning lamp in the dash by picking up power on the black wire when the motor is in the over-ride position.
Possibly the Tach solenoid connector on the back of the tachometer.
With this unplugged the wipers wouldn't work unless it's been by-passed.
Does the connector look like this? Do the wipers work?
Possibly the Tach solenoid connector on the back of the tachometer.
With this unplugged the wipers wouldn't work unless it's been by-passed.
Does the connector look like this? Do the wipers work?
Thanks again
Wes
Thread Starter
Drifting
Joined: Jan 2014
Posts: 1,866
Likes: 140
From: Sadieville Kentucky
working on wipers have put in new switch still not working .I am not very good at wire diagrams but have found most components except one relay . I have power at large red wire on connector with 3 pins and power when I turn on wipers at three pin connector ,center pin ,at wiper .I took wiper assy.out now on bench how can I test it ? There is a relay just behind brake booster on firewall with nothing to it and a pink and green connector coming out of firewall female connector taped off hooked to nothing
Thanks
Le Mans Master
Joined: Jun 2005
Posts: 5,447
Likes: 3
From: Syracuse NY
Hi
working on wipers have put in new switch still not working .I am not very good at wire diagrams but have found most components except one relay . I have power at large red wire on connector with 3 pins and power when I turn on wipers at three pin connector ,center pin ,at wiper .I took wiper assy.out now on bench how can I test it ? There is a relay just behind brake booster on firewall with nothing to it and a pink and green connector coming out of firewall female connector taped off hooked to nothing
Thanks
working on wipers have put in new switch still not working .I am not very good at wire diagrams but have found most components except one relay . I have power at large red wire on connector with 3 pins and power when I turn on wipers at three pin connector ,center pin ,at wiper .I took wiper assy.out now on bench how can I test it ? There is a relay just behind brake booster on firewall with nothing to it and a pink and green connector coming out of firewall female connector taped off hooked to nothing
Thanks
Here's Willcox's '68 wiper motor bench test video.
Thread Starter
Drifting
Joined: Jan 2014
Posts: 1,866
Likes: 140
From: Sadieville Kentucky
I believe the relay you're looking for is under the shifter console, toward the front, in front of the radio.
Here's Willcox's '68 wiper motor bench test video.
http://www.youtube.com/watch?v=XpkbCGkFaJs
Here's Willcox's '68 wiper motor bench test video.
http://www.youtube.com/watch?v=XpkbCGkFaJs
Wes
Thread Starter
Drifting
Joined: Jan 2014
Posts: 1,866
Likes: 140
From: Sadieville Kentucky
Well I can only get the motor to run if I put power to the brown wire ,it will run on high and low speed .I took the plastic assy. apart where the points are and everything looks ok ? any suggestions .
Thanks
Wes
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From: New Or-leens Loo-z-anna
The fact that the motor works at all is a good thing. If I was at home I would take a pic of how I have mine retired. P m me tonight and remind me to post a pic if you do not get it working correctly.
I read that the '68 wiper motor has a constant 12v positive wire connected to it.....so the wiper switch mainly switches the ground connection to the speed that you select on the switch.
Since Bubba did away with my wiper door and all the electric items, I had to rewire that part of the harness so the wiper motor woul. Work correctly with the relay under the center console/the wiper switch above the gauges /and the sub-harness that connects to the wiper motor.
I read that the '68 wiper motor has a constant 12v positive wire connected to it.....so the wiper switch mainly switches the ground connection to the speed that you select on the switch.
Since Bubba did away with my wiper door and all the electric items, I had to rewire that part of the harness so the wiper motor woul. Work correctly with the relay under the center console/the wiper switch above the gauges /and the sub-harness that connects to the wiper motor.
Last edited by doorgunner; Aug 20, 2014 at 08:31 PM.
Thread Starter
Drifting
Joined: Jan 2014
Posts: 1,866
Likes: 140
From: Sadieville Kentucky
The fact that the motor works at all is a good thing. If I was at home I would take a pic of how I have mine retired. P m me tonight and remind me to post a pic if you do not get it working correctly.
I read that the '68 wiper motor has a constant 12v positive wire connected to it.....so the wiper switch mainly switches the ground connection to the speed that you select on the switch.
Since Bubba did away with my wiper door and all the electric items, I had to rewire that part of the harness so the wiper motor woul. Work correctly with the relay under the center console/the wiper switch above the gauges /and the sub-harness that connects to the wiper motor.
I read that the '68 wiper motor has a constant 12v positive wire connected to it.....so the wiper switch mainly switches the ground connection to the speed that you select on the switch.
Since Bubba did away with my wiper door and all the electric items, I had to rewire that part of the harness so the wiper motor woul. Work correctly with the relay under the center console/the wiper switch above the gauges /and the sub-harness that connects to the wiper motor.
wes
Thread Starter
Drifting
Joined: Jan 2014
Posts: 1,866
Likes: 140
From: Sadieville Kentucky
68 windshield wiper problem
I believe the relay you're looking for is under the shifter console, toward the front, in front of the radio.
Here's Willcox's '68 wiper motor bench test video.
http://www.youtube.com/watch?v=XpkbCGkFaJs
Here's Willcox's '68 wiper motor bench test video.
http://www.youtube.com/watch?v=XpkbCGkFaJs
what I found was there is a small set if contact points in the plastic housing and do you happen to know how mich gap they should have on them?
Thanks
Wes
Le Mans Master
Joined: Jun 2005
Posts: 5,447
Likes: 3
From: Syracuse NY
I'll reread your previous post when I have time and see if I can help you out. It's been a couple years.
Last edited by DZRick; Aug 21, 2014 at 12:15 AM.
Thread Starter
Drifting
Joined: Jan 2014
Posts: 1,866
Likes: 140
From: Sadieville Kentucky
The wire Newt is talking about would be the wiper over-ride lamp. but this was a single black wire with a socket on the end of it. It operated the over-ride warning lamp in the dash by picking up power on the black wire when the motor is in the over-ride position.
Possibly the Tach solenoid connector on the back of the tachometer.
With this unplugged the wipers wouldn't work unless it's been by-passed.
Does the connector look like this? Do the wipers work?
Possibly the Tach solenoid connector on the back of the tachometer.
With this unplugged the wipers wouldn't work unless it's been by-passed.
Does the connector look like this? Do the wipers work?
It's a good thing I am not charge a customer to solve this problem because if i gave him a bill for my time he would just say it's your car now
Thanks for help .
Thread Starter
Drifting
Joined: Jan 2014
Posts: 1,866
Likes: 140
From: Sadieville Kentucky
68 windshield wiper problem
After further investigation I think part of the problem is ,thru wear and age, the little point contact in the transmission part of the motor are not disconnecting when i turn off motor to park the wipers ?? I took everything apart(My mom said I always did that as a kid only now I put it back together) and see how this unit functions .I am going to try to bend the little arm on the point contact to see if that helps .I swear the guy that designed this is locked up in a mental home ??
Thanks Wes
Le Mans Master
Joined: Jun 2005
Posts: 5,447
Likes: 3
From: Syracuse NY
Still working on wiper problem .The motor does operate on bench the problem I think is in the small piece with the contact points in it ? If i see correct when power goes to the yellow wire it clicks and the solenoid allows the points to touch and then power can go from the hot red wire across to the black and red wire which powers up the motor ? when power to yellow wire is gone the solenoid pops and power is cut from red hot wire to black and red wire to motor Does the tach solenoid have to be in a certain position ? When I check the brown with white stripe wire it shows grounded back to the tach. solenoid ?? is this correct ?Is that assy. with contact in it available by it's self ?
It's a good thing I am not charge a customer to solve this problem because if i gave him a bill for my time he would just say it's your car now
Thanks for help .
It's a good thing I am not charge a customer to solve this problem because if i gave him a bill for my time he would just say it's your car now
Thanks for help .
The solenoid on the back of the tach controls the vacuum to the wiper door.
I'd see if you can get the motor to correctly bench test before tearing more stuff apart. Just a suggestion.
Thread Starter
Drifting
Joined: Jan 2014
Posts: 1,866
Likes: 140
From: Sadieville Kentucky
wiper on 68
It sounds like you are back feeding the motor on the brown wire, The brown should only have voltage when the motor is running
the brown with white is a ground and goes to the wiper override switch, not the solenoid.
The solenoid on the back of the tach controls the vacuum to the wiper door.
I'd see if you can get the motor to correctly bench test before tearing more stuff apart. Just a suggestion.
the brown with white is a ground and goes to the wiper override switch, not the solenoid.
The solenoid on the back of the tach controls the vacuum to the wiper door.
I'd see if you can get the motor to correctly bench test before tearing more stuff apart. Just a suggestion.
Thanks for help
Wes
Le Mans Master
Joined: Jun 2005
Posts: 5,447
Likes: 3
From: Syracuse NY
I did perform a bench test with the Willcox info. and everything works ok except it will not park and shut off which I think is due to the fact that the arm in the plastic case does not go far enough to break the connection to the little contact that feeds power from red wire to motor .I am going to try to make an adjustment on that little contact next .I am also going to clean and check all grounds on the car next .
Thanks for help
Wes
Thanks for help
Wes
Don't break anything.
I'll be back
Thread Starter
Drifting
Joined: Jan 2014
Posts: 1,866
Likes: 140
From: Sadieville Kentucky
Wes
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,847
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Okay.. been reading through this today.
When you bench test exactly as shown in the video, and when you ground the green with the blue wire ground removed, it won't park. Is this correct?
I also thought you said, you powered up the brown wire to get the motor to run..
Willcox
When you bench test exactly as shown in the video, and when you ground the green with the blue wire ground removed, it won't park. Is this correct?
I also thought you said, you powered up the brown wire to get the motor to run..
Willcox