Hi everyone, I’m in the midst of some under dash work including a heater core replacement and refreshment of the boxes. 

There’s this large vacuum line coming off of the check valve by the steering column. Service manual doesn’t show where this one goes - unless I’m misreading. 

Pictures attached - any ideas?

Views: 136

▶ Reply to This

Replies to This Discussion

One of those big hoses go to the NSS and to the parking brake vacuum canister.

I got it!

The hose coming out of the right side of the valve seems to be the supply line for vacuum. It goes up to the bulkhead on the firewall. The nib is circled in red and also pictured is the backside of said bulkhead, from the engine bay, showing the other section of the vacuum line.

RSS

Photos

  • Add Photos
  • View All

Forum

Congratulations Logan Robb!

Started by Jason Edge in Chapter Discussion. Last reply by Dennis P. DiBari on Thursday. 1 Reply

A Big Congratulations to 63-64 Chapter member Logan Robb with his October 2026 The Self-Starter cover story featuring his 1964 Fleetwood 60 Special.Way to go, Logan!!…Continue

October, November, December 1962 Serviceman Bulletins Rescanned & Uploaded

Started by Jason Edge in 1963/64 Cadillac Specific Discussion Sep 16. 0 Replies

Some time back I started rescanning the Serviceman Bulletins starting with October 1962 and the October Supplement as it was the month the 1963 Cadillac was introduced. I scanned November and let…Continue

Ignition Resistor Wire Purpose, Ignition Switch Circuit

Started by Jason Edge in 1963/64 Cadillac Specific Discussion Sep 15. 0 Replies

Sunday we had a very detailed discussion in our Zoom meet-up on the resistor wire and the cranking and ignition system, I consulted ChatGPT and gave it the 1963 Shop manual and asked (prompted) with…Continue

63 Coupe de Ville Interior Wiring Diagram

Started by Robert Schles in 1963/64 Cadillac Specific Discussion. Last reply by Jason Edge Sep 15. 3 Replies

The interior wiring is spread out among a few different schematics. I combined them into one drawing. I hope it can help someone troubleshoot the intermittent interior lighting and those pesky door…Continue

Blog Posts

Authenticity Manual

Posted by Dennis P. DiBari on August 27, 2026 at 12:45pm 2 Comments

Hi Robert,

     I emailed you more pictures for the Authenticity Manual.

Dennis DiBari

1963 RHS A/C kick panel - photos needed

Posted by SK on June 2, 2025 at 2:20pm 2 Comments

Could someone post front and back photos of the 1963 right-hand kick panel with A/C?

My car didn’t come with the original kick panels, so it's a bit of a mystery to me how I should cut the backing board and carpet to fit around the A/C.

Many thanks,

-Samu

'63 Tailfin Tales

Posted by Mark Mata on February 22, 2025 at 5:00pm 9 Comments

New old stock seat material

Posted by Ray Schick on August 22, 2024 at 6:25pm 2 Comments

I bought this seat material thinking that it’s…

Continue

Videos

  • Add Videos
  • View All

© 2026   Created by Jason Edge.   Powered by

Badges  |  Report an Issue  |  Terms of Service