I know you guys have probably been asked hundreds of times about vacuum lines-does anyone know if it's possible to buy a downloadable version of detailed schematics of electrical and vacuum lines for my 1980? I've found SO much disconnected wiring and vacuum lines and I want it to be right.. The lights work so I know those vacuum lines are right but the A/C comes out below the dash instead of the vents.I know I can rig it so that it blows only through the vents for now but I want it to be perfect. It's SUCH a fine car! Adams' Apple2009-07-02 20:05:15

Hey Brian, KDADDY792009-07-02 07:17:42

I have a PDF file of the electrical schematics for a 1980 Corvette.  If you will send me a private message with your email address I will send it to you.

Brian, check the corvette-101.com site.... the Corvette101 site is invalid. Dejablu2009-07-01 16:22:23

Brian,  The PDF that FirstCorvette told you about and the GM service manual is about as good as you are going to do on the wiring diagram.  Doc Rebuild has some FANTASTIC wiring diagrams but not for anything in the 80s.  I emailed them a couple weeks ago hoping they were going to offer them for the later years.... answer was short and sweet.. NO.  The problem with the vents could be a bad vacuum control valve that controls the air ducting, a bad actuator on a damper or something much more simple.  Look under the hood and find where the vacuum lines connect to the CHECK VALVE . One of the two lines that connects to the check valve goes to a "T" .  One side of that line goes through the firewall to the heater controls.  Carefully check the "T" itself and the hose where it goes through the firewall, make sure it isnt broken or the 'T' isnt cracked.

[QUOTE=mysticstriper]P.S. The guy that sent me to y'all is Crossfire 82 on y'alls forum, he's a lifetime member and said you guys are great.[/QUOTE]

And you fell for that line???



The factory service manual is a must have. The AIM(Assembly Instruction Manual) is also invaluable. Both are available from some of the Corvette parts vendors, such as some of our Sponsors here. You can also find them on flea-bay.
Air blowing out the defrost or heater vents all the time is always gonna be a loss of vacuum issue. Finding the leak is the hard part...

Actually, yes I fell for that line! LMAO! He's known as "Check6" on my Mustang forum and quite a nice guy. I REALLY appreciate you guys helping me out, it's my first vette, I saw it, it looked really nice, I stopped and drove it and fell in love. No, it's not as fast as my Stang, but not much is-there's just a whole different feeling I get driving my vette that I can only explain as IT FEELS RIGHT. I never wanted a car SO bad as the moment I saw it. Now, I checked out a few other vette forums as a guest and just read threads and felt like those guys were just rich snobs that made fun of each other. From what I've seen here I feel quite comfortable already. Thank you guys and you'll be seeing a lot more dumb questions from me soon!

Yes, it was nice chatting with yall too bad I was so late getting online. Working on the vette has taken me over a little Too much! LOL Thanks for all the help guys, I'll be buying that factory service manual as soon as I can find it. The sponsors you say? Gonna be a long night!

[QUOTE=mysticstriper] Thank you guys and you'll be seeing a lot more dumb questions from me soon![/QUOTE] No such thing as a dumb question 'round these parts. Glad to see you joined us .