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Home >> Honda >> 1987 >> Prelude Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Spark Control System >> Component Testing >> Vacuum Switch C >> Auto. Trans.

Auto. Trans.

  1. Disconnect vacuum hose No. 15 to vacuum switch C and connect vacuum pump to hose. Apply vacuum to switch. Check for continuity between Black/Yellow and Blue/Black wire terminals of control box 6P connector. Continuity should be present when vacuum is released, replace vacuum switch C and retest.