Vacuum Switch C: Prelude
- Disconnect vacuum hose number 15 to vacuum switch C and connect a vacuum pump to the hose. Apply vacuum to switch. Check for continuity between Black/Yellow and Blue/Black wire terminals of control box 6P connector.
- Voltage should be available when a vacuum above 1.2 in. Hg is applied. If there is no voltage, replace the vacuum switch C and retest.