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Old 10-29-2010, 05:56 PM
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Hook a hose to manifold vacuum and then to a one way check valve then put A Tee in line . hook one to a vacuum storage canister and the other to the feed to the HVAC control. There are 2 hoses I know. One of them comes from the HVAC controller to the hot water control valve for the olds motor.The other one is the supply for the control.Try it one way and check for dash vent and defrost and foot vent etc. If it doesnt work switch the hose and check again.
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