TM-9-2350-277-20-1 Unit Maintenance Manual Volume 1 M113A3 M577A3 M1064A3 M1068A3 M58 Download
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TM 9-2350-277-20-1 ENGINE CRANKS BUT WON’T START BELOW 40 (AIR BOX HEATER IS USED)—Continued 0022 00 B6Y 1. Turn MASTER SWITCH to OFF. 2. Remove instrument panel for access. See task: remove instrument panel mounts and ground leads (WP 0295 00). 3. Remove circuits 406 (1) and 27C (2) plugs from air box heater switch jacks (3) and (4). 4. Measure resistance between switch jacks (3) and (4) with air box heater switch depressed. 5. Does multimeter read 0 ohms? YES NO B6YN 1. Replace air box heater switch (WP 0282 00). 2. Verify no faults found. B7Y 1. Remove circuit 27 plug (1) from instrument panel circuit breaker (2). 2. Measure resistance between cable assembly 12349858 circuit 27 (1) and 27C (3) plug pins. 3. Does multimeter read 0 ohms? YES NO B7YN 1. Repair special purpose cable 12349858 circuit 27C/27 (WP 0382 00). 2. Verify no faults found. B8Y 1. Repair harness 12349881 circuit 406 (WP 0382 00). 2. Verify no faults found. 0022 00-8