[Dugan]

My vacuum system needs help.

I have AC, no cruise, no locks.

There is a larger hose that routes with the small hoses for the controls. Is this the supply for the heater controls? When I blow air into this hose there is a leak under the dash.
The small hose that goes to the water valve has a larger hose with it where it goes thru the firewall. This larger hose is rotted off. Is this the supply hose for the heater controls?

Can I use the other hose under the dash that supplies the rear vents and the neutral safety switch?

Also, do all these cars have the temp control device attached to fhe plenum?