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TM-9-2350-261-20-1 Unit Maintenance Manual Volume 1 M113A2 M577A2 M1064 M1068 M1059 M901A1 Download

Page 498 of 1236

TM 9-2350-261-20-1 NO POWER TO AC CIRCUITS (M1068 ONLY) — Continued 0087 00 6Y 1. Measure resistance of circuit 19B from terminal 2 (1) of switch S1 (2) and A2 (3) of relay K5 (4). 2. Measure resistance of circuit 20A from terminal 3 (5) of switch S1 (2) and A3 (6) of relay K5 (4). 3. Does multimeter read 0 ohms? 6YN 1. Faulty leads 19B and/or 20A. 2. Notify your supervisor. 7Y 1. Remove leads 19A and 19B from switch S1 position 2. 2. Measure resistance with switch S1 (1) in both up and down positions. 3. Does multimeter read 0 ohms when switch is down and infinite ohms when switch is up? 7YN 1. Replace switch S1 (WP 0730 00). 2. Verify no faults found. 0087 00-8