TM 10-3930-669-20 26.  ELECTRICAL SYSTEM DOES NOT MAINTAIN A CHARGE (CONT). KNOWN INFO Engine operates. Batteries OK. POSSIBLE PROBLEMS Alternator faulty. Alternator power wire faulty. Wire 34 faulty. Relay R1 ground wire faulty. Relay R1 faulty. Regulator faulty. KNOWN INFO Engine operates. Batteries OK. Alternator OK. POSSIBLE PROBLEMS Alternator power wire faulty. Wire 34 faulty. Relay R1 ground wire faulty. Relay RI faulty. Regulator faulty. TEST OPTIONS Voltage test. STEACE-R #89. REASON FOR QUESTION If 22 to 24 vdc (field voltage) is not     present.          alternator     is faulty. TEST OPTIONS Voltage test. STE/ICE-R #89. REASON FOR QUESTION If 22 to 24 vdc are not present, alternator power wire is faulty. ¬ ¬ 2-284