need a 69L headlamp/wiper vacuum schematic
I'm looking for a 69lL vacuum schematic. My car, July 69 build, has the wiper vacuum relay near the master cylinder and 2 headlamp relays. All the schematics I've seen only show 1 headlamp relay. 70-2 show the 2 headlamp relays but with a 3 port vacuum tank. I have a 2 port vacuum tank. Do I have a Frankenvette?
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Re: need a 69L headlamp/wiper vacuum schematic
Mark,
Doc Rebuild sells a nice laminated diagram of the headlamp and wiper door vacuum system for late `69s. It is their part number 2771-803. You are correct, your car should only have a single headlamp relay valve.
Mike -
Re: need a 69L headlamp/wiper vacuum schematic
I have the Doc's poster. It shows one headlamp relay valve. I thought i read in the TMJG that 69's went to 2 valves around my build date, July 69. I'll have to look through it again when I get home. Too bad the Doc is still closed. My to-get goodie list is growing.Comment
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Re: need a 69L headlamp/wiper vacuum schematic
Very interesting to learn - I had always assumed 1968 through 1972 models all had two headlamp vacuum relays, and shared the same vacuum tank.
LarryComment
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Re: need a 69L headlamp/wiper vacuum schematic
On page 205 of the TIMJG, it says early 69's had one valve and all others have two.Comment
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Re: need a 69L headlamp/wiper vacuum schematic
Mark,
I have a very late, Nov 27, 69 body build car.
I just looked and it only has one relay mounted between the horns to operate the headlamps.
I have a Doc Rebuild "Late '69 Head Lamp and Wiper Door Vacuum Hose & Tee Kit" laminated diagram. This diagram shows only one relay for the headlights.
If you would like, send me a message here with your cellphone number and I'll send you a picture of the Doc Rebuild diagram. It's an 8 x 11.
Rich KossumComment
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Re: need a 69L headlamp/wiper vacuum schematic
Mark, I have a 69 # 236-- here and it has one relay between the headlights. It has two port tank. I believe its a July 69 car. Corvette Central may have the system schematic available. I have one from the 1990's and it shows two relays for early 69 with a 3 port tank and one relay for late 69 with a 2 port tank. Is the front end original? Cars near your vin could help.Comment
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Re: need a 69L headlamp/wiper vacuum schematic
I have the Doc's laminated poster. I'm not sure how much of the front end is original. The original owner had 70-2 front and rear fenders glued on along with 70-2 front and side grilles. Is the upper surround 69? I do not know. The TIMJG says only early 69's had one relay then went to 2 relays. It is on page 205 6th edition.Comment
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Re: need a 69L headlamp/wiper vacuum schematic
Like Rich, I have a Nov 69 built coupe and the single relay is mounted squarely between the horns.
DonComment
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Re: need a 69L headlamp/wiper vacuum schematic
I have a July car. does this mean the TIMJG is incorrect? There is a picture showing the 2 valves but the grille looks like a 70-2.Comment
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Re: need a 69L headlamp/wiper vacuum schematic
I have both the "Early 69", and "Late 69" diagrams from Doc Rebuild. They BOTH show ONE relay between the headlights, and a two-port tank.
Dave S. also has a Nov '69 showing only one valve between the headlamps.
Mark M. has '69 #236, which would be an early car, that has only ONE relay between the headlights.
Yes, the '68-69 TIMJG shows a picture of a '70-72 car with the egg-crate grill that has TWO relays mounted between the headlights.
Perhaps someone with an early '70 car will chime in to describe what their set-up is. Did a change-over happen with the '70+ cars? Does the '69TIMJG need updated?Comment
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Re: need a 69L headlamp/wiper vacuum schematic
You may have found another error.
I have a July 9th, 1969 built car here, it has 1 vacuum relay. Maybe the TIM&JG maybe should read early 1970 ???
1st thru 4rd Editions did not even address the relays. 5th and 6th Edition read the same.
1969 AIM UPC12 Sht A15 has a change record 10-4-68 ?? maybe 10-1-68, Chnge #3, hose routing revised. But the diagram only shows 1-relay.
1970 AIM UPC12 Sht A13 shows 2-relays, but the sheet was redrawn & revised on 1-29-70, Change record #6. I don't know what changes 1-5 are, it's on a prior sheet. So, did this happen early in 1970?
I have an early 70 sitting close by, a few miles away, I'll try and look at it today.
Are you sure the front end is a 1969? What's the dates on the horns? Do the headlight vacuum actuators have dates on them?
Gary BComment
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Re: need a 69L headlamp/wiper vacuum schematic
I bought it in 1977 from the original owner and he had the fenders changed in the early 70's because he liked the flares that the 69 does not have. Maybe they grafted a complete nose onto the car instead of just fenders. He has since died so I can't get a definitive answer as to why. Bummer is it's a L71 factory N14 car. I guess my next step is to do a visual of the vacuum hoses to see where the supply hoses are T'd and draw a schematic for Frankenvette. Luckily everything is working and I just want a schematic in case something does fail.Comment
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Re: need a 69L headlamp/wiper vacuum schematic
1969 Jan 20th car has a single relay. 1970 January 29th build has 2-relays.
I'm thinking, unless somebody has a December 1969 build car with 2-relays, the 68-69 TIM&JG needs to be updated.
Now we need to look at 68's, see when two relays stopped, if they used two !!
Gary BComment
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Re: need a 69L headlamp/wiper vacuum schematic
The 69 I mentioned is vin 236xx not car 236. 38762 69's made so my example is probably a late example. Pardon my previously used dashes.Comment
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