[OrbitOrange]

1970 GTO
AC wiring, but AC is removed til I can rebuild it all. I just got the fan switch working and repaired the cold/heat cable. The problem I seem to have is I can get the selector to make air blow out the defrost and the floor vents, but I can't seem to get it to blow out the center, left/right vents of the dash. Any clues would be of great help while I have the dash taken apart some and can access alot of it. Vacuum diagrams if anyone has them also.

Thanks Guys for your help.
John

[ORBIT 433]

John
I had a similar issue with my 73 TA. The air would not blow out the vents but next to the AC box on the fire wall is a vacume pod. If you move that lever in the opposite direction you should have air out of the vents. At least that's how I got mine to work in the TA.
Joe

[hondo237]

see your reply not familiar with ac box how does it look like i have a 71 lemans mechanic changed hoses and now having same trbl check vacuum like seem to be in tact appreciate the help

[sport coupe]

Future reference. Diagram does not show engine vaccum source.

[69Farburd]

If yours is like my 69 Firebird, the controls are actuated by vacuum from the engine. Do you have a vacuum line attached to the carb, and are you trying to get to work with the engine running?

[OrbitOrange]

I have the vac attached to a port on the intake, and I was testing with engine running. I know it won't work without the engine running creating vacuum. I might try actuating them with a vacuum pump for test purposes.