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Function Selector Switch Vacuum Application Table

NOTE: A leak in the vacuum control circuit may occur during acceleration (slow leak) or may exist at all times (large leak) and may exist only when specific functions are selected (indicating a leak in that portion of the circuit). The vacuum hoses used in the passenger compartment control circuit are constructed from PVC plastic material. The vacuum hoses used in the engine compartment are constructed of Hytrel®. Because of the materials used, never pinch off the vacuum hoses to locate a leak during diagnosis. A golf tee can be used as a plug when it is necessary to plug one end of the vacuum hose for leak test purposes.
FUNCTION SELECTOR SWITCH VACUUM APPLICATION TABLE

Switch Port Color Function Function Selector Switch Position
MAX A/C A/C Panel Floor/Panel OFF Floor Floor/Defrost Defrost
1 White Recirc/fresh V NV NV NV V NV NV NV
2 Yellow Defrost V V V V V NV V NV
3 Red Floor NV NV NV V V V V NV
4 Orange Panel/Floor V V V V NV NV NV NV
5 Black Vacuum source V V V V V V V V
6 Not Used Not Used N/A N/A N/A N/A N/A N/A N/A N/A
V=Vacuum
NV=No vacuum
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