Sarcastro

I have a 1968 vette and am having some problems with the windshield wipers.

The first problem is that I think the Wiper Override switch is not hooked up properly. I have one brown and white wire with a connector that is connected to the switch. I also have a black wire (no connector) dangling loose. I'm pretty sure the black wire should be connected. Should it be? If so, how does it connect as there is only one spot to connect to the switch and it is occupied by the brown and white wire.

Any help would be greatly appreciated.

...Roger...

That brown and white wire needs to be able to go to ground.
I'm not that familiar with the 68 switch but if it only has 1 spade on the switch the switch itself must be grounded and that black wire might be what grounds it.
Does that black wire come out of the harness ?

DZRick

This was posted by Willcox a while back.


If needed I can take a look at mine and take a picture or two if you'd like.

Sarcastro

From the diagram it looks like both the black and brown wire should be hooked up to the switch. The black wire goes into the wiring harness but I still am not sure how it should be connected to the switch so a couple of pics would be great.

DZRick

Here is where mine grounds. Not the easiest picture I've taken.

...Roger...

Great pic , Thanks I see the star washer so the switch grounds to the metal. So there is only 1 spade on the switch ?

Interesting because Docs diagram shows the brown and white wire but no black wire labeled for the switch ground. He does have a black wire with the round terminal labeled as a speedo ground.....I wonder if he got that wrong and its actually the switch ground ?

DZRick

It's my understanding that the '68 wiper motor is unique in as it is switched using the ground. The override switch does only have one spade and either makes or breaks the ground.

I'm pretty sure that there is another separate black (ground) that attaches to the gauges, I'd have to check my AIM to be sure though my memory isn't all that good right now.

...Roger...

The Doc diagram shows a female for the speedo and a female for the tach (like in later years) but also shows an extra round terminal labeled speedo ground. I think that might be the one you have grounding the switch....probably just labeled wrong.

Sarcastro

Thanks for all the info, I was pretty sure it just grounded to the metal but wanted to be sure. I got my switch hooked up and metered both sides of it and the voltage is appropriate on both...except the wipers still don't work. When I flip the switch I can hear selenoids clicking in the motor but no wiper movement. Next step, check the wiper switch, just to eliminate it. Then bench test the motor.

DZRick

It might be Roger although the Doc is usually spot on with his stuff.

I'm assuming it is the '68 diagram your looking at? Either way a grounds a ground,right and there is nothing saying mine is correct.

1Fordman

Geez Rick,

You must have a stiff neck after taking that shot!

...Roger...

he is usually right on but I can't find a wire on the diagram that grounds the switch,I'll keep looking. (Yes I'm looking at 68 Doc diagram.)

1Fordman

Does your override switch have 2 spade connectors on it? If so it's a late 69 up switch. I had to use one of those in the 68 because the original 1 spade switch was shot and not available.

Mine has the black wire in the wire harness connected to one of the spade connectors on the switch and a jumper lead from the other spade connector connected to the body grounding point where the other harness grounds attach.

DZRick

It just took about 10 shots reaching in and snapping pictures to get one that was clear enough to post. I'm not gumby, Tom!

0Willcox Corvette

The switch on the 68 only had one wire terminal and the ground was at the bracket as shown in DZ picture. The 68 switch picks up the black ground thru the switch.. Hope that made sense.. DZ is either double jointed... well I won't go there..

Willcox

DZRick

MarkHarclerode

I have a 1969 that someone has completely taken out all of vacuum and switch related Windshield mechanisms. Is the 1969 override switch similar to the 1968 (One Connection?) or does it have 2 like the 1970?

I have seen both and wanted to buy the correct override switch..

The 1 connection is a lot more expensive than the 2 connections like the 1970s..

Thanks