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Vacuum Switch B

Disconnect vacuum hose at vacuum switch B and connect vacuum pump to switch. Apply vacuum and check for voltage at vacuum switch. Voltage should be available under conditions shown in VACUUM SWITCH B VOLTAGE table.

VACUUM SWITCH B VOLTAGE

Application Vacuum Hose Wire Color (1) Voltage Available
Fed 1 Brn Above 6 in. Hg
Fed. 1 Brn/Blk Below 6 in. Hg
Calif. 12 Brn Above 8 in. Hg
High Alt. 12 Brn Above 4 in. Hg
(1) Vehicle speed above 10 MPH.