1977 A/C Question
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Instructor
Joined: Mar 2008
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From: Farifax Station VA
1977 A/C Question
I have all of the vacume lines exposed and am attempting to get things to work porperly. The issue: the vacume diaphgram that opens the defroster door has two nipples - one on the top and one on the bottom. the assembly manual only shows an attachment for one vacume hose on the top. If I follow the diagram in the book, I have no place to connect the bottom vacume line -- any ideas?
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From: Dayton, Ohio
I have all of the vacume lines exposed and am attempting to get things to work porperly. The issue: the vacume diaphgram that opens the defroster door has two nipples - one on the top and one on the bottom. the assembly manual only shows an attachment for one vacume hose on the top. If I follow the diagram in the book, I have no place to connect the bottom vacume line -- any ideas?
Bottom line on the dash control are numbers.#3 goes to the defrost,#4 goes to the AC air valve which is right under the defrost,#5 goes to a T that goes to the recirc door and the outside air valve#1 goes to a T that goes to the engine source vacuum and inside water shutoff switch#2 is blank
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Instructor
Joined: Mar 2008
Posts: 221
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From: Farifax Station VA
The defroster diaphragm has 2 nipples on it...one at the top and one at the bottom. on page 134 (sheet 63.5) of the AIM it explains how to route the defroster hoses. My car has A/C which reflects the digrams on page 133, showing a single vacume hose to the defroster valve. I am begininning to think that someone before me replaced the valve (with the wrong one). everyithing else on the car is correct.
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