Heater/ac vacuum lines

[jvclark]

On a 79 L82 and anyone tell me how the vacuum lines are routed from a vacuum source...........I have 4 vacuum lines at the heater/ac vacuum control switch. One goes to the lower vent and another is routed thru the firewall to the upper vent. The other 2 I'm not sure where they go unless I tear the dash out and trace them down(don't want to do that unless I need to). Also on the hearter/ac control vacuum control switch I have one port the doesn't have a vacuum line connected to it (should it have one any where does it go to......

Thks
jack

 

[Antz81]

Have attached the diagram from my 81 FSM. Should be the same for a 79.
There should be a port with nothing on it, so no problem there.

 

[jvclark]

Have attached the diagram from my 81 FSM. Should be the same for a 79.
There should be a port with nothing on it, so no problem there.
View attachment 22009

Thks. This is very helpful!

 

[6880 Mike]

Thks. This is very helpful!

FWIW: order the 79 assembly instruction manual (AIM). AIMs are handy for lots of things.

 

[jvclark]

FWIW: order the 79 assembly instruction manual (AIM). AIMs are handy for lots of things.

Thks, Mike, will do...