No schematic I have seen uses the #s. I'll take a look at Zip and see if they might use the #s.

The #2 gets the hose that has vacuum on it with the engine running.

(The #3 port dumps the vacuum from the hose going to the headlights when you pull the **** out and remains wide open just like a vacuum leak until you push the **** back in,then the #2 is connected to the #3.)

 

Birthdays..........They're beginning to suck.

 

Thanks for the response Rog.

Birthdays (for threads anyway) are good.... it shows Corvette Forum is working. And they help me.

 

Wow, I have not changed anything related to my vacumn system but have purchased the new hoses to install. After reading this I am curious about the hissing sound. Mine does that! Only when the override switch is pulled and THEN the headlight switch is activated. Are you saying my problem may be only reversing the lines? Sounds like I am going to be going out in the next few days and playing around with this one. I hope that is all it is!

 

My headlight switch hisses, I'm gonna check to see if the nipples are backwards.
Interesting info.

 

Very possible thats all thats wrong.

The vac diagrams LOOK complicated but really are not.
At the HL switch there are only 2 nipples to think about.
When the HL sw is pushed in the 2 nipples are connected and merely pass the vacuum though the hoses.

When the HL switch is pulled out the nipple closest to the **** (port #2 marked on switch) must seal off the hose connected to it-the hose connected should be the vacuum source coming from the manifold.

The nipple furthest from the **** (#3) will simply open up to create a leak-this leak will tell the HLs to open.

If the wrong hose ,the one coming from the manifold, is on port 3 it will hiss the entire time the HLs are on.

The pulldown works EXACTLY the same way and nipple location is the same.

 

Great info, thanks for the explanation

 

In doing a final check on wiring connections, I evidently forgot to attach the RH Pillar Ground. Is that a spade that is screwed to the firewall/pillar area?

How many grounds are there under the center console? One to the center console faceplate and one to the brace under the radio?

Last - my DocRebuild OooSoEeze says there is a Auxilary A/C Harness connection. What is that for?

Thanks

 

I believe some years use a spade and some use an eye with a screw through it. New harness? If your ground lead has a female then you need a spade , I prefer the eye with a serrated washer on each side.

Off the top of my head I think I can picture 7 ground sights.
left pillar,speedo,tach,console,power window at console,right pillar and the all elusive center cluster ground which is the center spade of the temp gauge connection. This is where IMO doc missed the boat , this ground site should have had a note emphasizing its importance.

Which of the 3 pages are you looking at for the Auxiliary connection ?

 

1969 Dash Wiring Harness with A/C. The connector is shown on the bottom right of the page just above the Heater/AC bulb connector.

I will re-verify the grounds... appreciate the info

 

That 14 brown should plug into the AC harness,go to your other page and on the right is the AC wiring , 5th connector up from bottom labeled Ign. Sw. Acc Terminal (14 brown).

 

Disregard the following text. I have done more research and see I mis-stated some things. Still struggling - will repost in a moment and hopefully gain ya'lls insight.



Hey Rog... ok - after pulling the console (again) - I found only one connector as we are discussing. That connector is under the Heater/AC control assembly and is a brown wire (although Doc Rebuild says its black). It must be the Auxillary RH Door Pillar Ground. I feel certain of this as it is in proper order according to the Doc's chart. I found it in the 1969 AIM on J346 (Item 6). I confirmed it ties into the dash harness just beside the black/grey wires for the Heater/AC bulb. However it does no say where it connects..

I do see the closely located ground for the console shifter plate.

Last - I cannot find the Auxillary A/C harness connector we speak of. I did trace it in DOc's OoSoEZ, and see it ties into the fuse block - NOT THE HARNESS.

All said - I think the ground I was thinking of on the right pillar/kick panel area (and maybe you were thinking this one too) is maybe for the A/C harness????? If so - wonder why they call it the Aux RH Pillar Ground if it is located under the center console??? Since I have Vintage Air - I have no OEM A/C Harness.

 

Thanks Roger for all this info. I'm at the point of reinstalling the lower dash pad. As probably the headlight switch hasn't changed much in design I'll connect the vac source hose to the port closest to the **** and pray I don't get the hissing sound If you don't want confusion dont read the following line :(because my aim shows the blue striped line (going to the override) to be connected to the port closest to the know lol)
Regards,
Nick

 

Shhhhh... thats probably where the confusion started and then everyone copied the AIM without confirming its accuracy and the rest is history.
Zip corrected their diagrams to them.
The website Corvette101 refuses to correct their diagram so this will continue.

 

...first - apologies for accidental hijacking this thread.

Of the 2 connectors I am trying to identify, I found only one. It is the Auxillary A/C Harness connector. It is brown, is incoporated into the harness and is correct in color and location on OoSoEZ chart. I believe I found this connector as well in the 1969 AIM on J346 (Item 6). I confirmed it ties into the dash harness just beside the black/grey wires for the Heater/AC bulb.

I also identified it on my old dash harness and confirmed by testing with a volt meter. By using my old A/C harness, OoSoEZ and the AIM, I now understand that the A/C harness initiates its wiring and power under the console area from that connector mentioned above.

However, I still cannot find the Auxillary RH Door Pillar Ground. I know it will be black as it is a ground. I checked my old harness and do not find it on it either. This ground connector should come out of the harness at or after the radio connector pigtail (according to OoSoEZ). My original radio pigtail/connector was cut off, so I was unable to assess whether the ground was part of the radio pigtail (like the dual wired ground on the console). But then I checked Lectric Limited's website and see the radio pigtail has no extra ground connection.

Can anyone show me where the Auxillary RH Door Pillar Ground connector comes out of the harness? Is this possibly an error on OoSoEZ?

 

I wonder if Auxiliary means some harness's have it some don't ? I have a 70 in next week I can look on it and see and the week after a 69 that was an early build.
And yes there are some errors on the diagrams.

 

Rog - appreciate the time/patience

 

Your welcome, as you can probably tell I kinda like this electrical stuff.

 

That is exactly what happened. Ours have been correct though for years. Thanks!