Vacuum Switch C: Prelude
- Disconnect vacuum hose No. 15 to control box at vacuum manifold. Connect vacuum pump to hose. Apply vacuum to switch. Check for continuity between Black/Yellow and Blue/Black wire terminals of control box 6-pin connector.
- Continuity should be present when vacuum above 12 in. Hg is applied. If continuity is not present, replace vacuum switch C and retest.