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I am attaching a couple of photos of a small hose which goes into my wiper compartment and then disappears into the side of the car into an area I don't think I can get into. Can someone tell me what the purpose of this hose is and where it's ends go?
I believe that hose goes to the plenum door diaphragm that is between the body and the right fender. When the A/C is put on MAX that door closes to shut off plenum air from entering the cabin.
I believe that hose goes to the plenum door diaphragm that is between the body and the right fender. When the A/C is put on MAX that door closes to shut off plenum air from entering the cabin.
Thanks .. Do you know what it attaches to in the engine compartment?
i believe it has been answered correctly.
My 68 BB AC car has the same vac line.
It does enter on the passenger side fender and dissapears.
If you could xray your passenger front fender you would see
a cad, rusted now probably, vac valve. It is impossible to service
with out removing or cutting something involving the front fender.
If you ever pulled the front clip that would be the time to test and replace it.
It will close/cut off the outside air to create a recirculation condition
of inside cabin air to cool faster when on AC setting.
You could have a friend move the AC controls on and off this setting and listen with a stethscope near the valve for movement.
I can hear my doors shut and open inside my car on start up.
They are noisey.
Marshal
Hi b,
You can see the green striped hose tee off the green hose from the outlet selector in the console on the interior side, exit the firewall (3 hole grommet)l, re-enter the firewall (your picture), and end up at the valve that controls the blower air door.
Regards,
Alan
This is a 71 schematic. The firewall (called out as dash panel?) is the heavy line drawn down the middle of the page. To the left is the engine compartment side and to the right is the interior side. Remember this is a schematic drawing not an engineers plan… that's why it looks a bit odd.
Wow Alan,
that sounds like the engineer who designed that played the rabbit came out of the hole saw the fox ran around the tree and went back down the hole.
No wonder no one can service this line.
Marshal
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unknown purpose hose
