TM 10-3930-669-20 1. ALL 24 VDC CIRCUITS DO NOT OPERATE (CONT). KNOWN INFO Main disconnect switch is on. Engine   cranks   but   does   not stay running. Wire 34 OK. POSSIBLE PROBLEMS Relay R2 ground wire faulty. Wire 7 faulty. Wire 26 faulty. Relay R2 faulty Engine switch faulty. KNOWN INFO Main disconnect switch is on. Engine   cranks   but   does   not stay running. Wire 34 OK. Relay R2 ground wire OK. POSSIBLE PROBLEMS Wire 7 faulty. Wire 26 faulty. Relay R2 faulty. Engine switch faulty. TEST OPTIONS Continuity test. STE/ICE-R #91. REASON FOR QUESTION If    continuity    is    not    present, relay R2 ground wire is faulty. TEST OPTIONS Voltage test. STE/ICE-R #89. REASON FOR QUESTION If 22 to 24 vdc are not present, wire 7 is faulty. ¬ ¬ 2-126