TM-9-2350-261-20-1 Unit Maintenance Manual Volume 1 M113A2 M577A2 M1064 M1068 M1059 M901A1 Download
Page 264 of 1236
TM 9-2350-261-20-1 INFRARED PERISCOPE WORKS IMPROPERLY — Continued 0040 00 B3Y 1. Remove instrument panel cable assembly circuit 27 plug (1) from instrument panel circuit breaker (2). 2. Measure resistance between circuit 516 plug (3) and circuit 27 plug (1). 3. Does multimeter read 0 ohms? B3YN 1. Repair instrument panel cable assembly circuit 516 (WP 0312 00). 2. Install original I.R. power pack (WP 0291 00 or WP 0293 00). 3. Verify no faults found. B4Y 1. Remove cable assembly circuit 516A plug (1) from I.R. power pack (2). 2. Turn MASTER SWITCH to ON (see your -10). 3. Turn I.R. POWER switch to ON (see your -10). 4. Measure voltage between cable assembly circuit 516A plug (1) and ground. 5. Turn MASTER SWITCH to OFF (see your -10). 6. Did multimeter read less than 17 volts? B4YN 1. Repair front main harness circuit 516A (WP 0312 00). 2. Install original I.R. power pack (WP 0291 00 or WP 0293 00). 3. Verify no faults found. 0040 00-4