TM 10-3930-669-20 25.  ENGINE STARTS WITH TRANSMISSION ENGAGED (CONT). KNOWN INFO 24 vdc circuits operate. Wire 33 OK. Diode module DM1 OK. Wire 39 or wire 40 OK. POSSIBLE PROBLEMS Diode module DM2 faulty. Wire 41 faulty. Relay R3 ground wire faulty. Relay R3 faulty. KNOWN INFO 24 vdc circuits operate. Wire 33 OK. Diode module DM1 OK. Wire 39 or wire 40 OK. Diode module DM2 OK. POSSIBLE PROBLEMS Wire 41 faulty. Relay R3 ground wire faulty. Relay R3 faulty. TEST OPTIONS Continuity test. STE/ICE-R #91. REASON FOR QUESTION If    continuity    is    not    present, diode module DM2 is faulty. TEST OPTIONS Continuity test. STEACE-R #91. REASON FOR QUESTION If continuity is not present , wire 41 is faulty. ¬ ¬ 2-278