TM-9-2350-261-20-1 Unit Maintenance Manual Volume 1 M113A2 M577A2 M1064 M1068 M1059 M901A1 Download
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TM 9-2350-261-20-1 ENGINE CRANKS BUT WILL NOT START BELOW 40 (AIR BOX HEATER IS USED) — Continued 0012 00 D3Y 1. Remove air box heater switch (WP 0241 00). 2. Remove circuit 406 (1) and 27C (2) plugs from air box heater switch jacks (3) and (4). 3. Measure resistance between switch jacks (3) and (4) with air box heater ON. 4. Does multimeter read 0 ohms? D3YN 1. Replace air box heater switch (WP 0241 00). 2. Verify no faults found. D4Y 1. Remove circuit 27 plug (1) from instrument panel circuit breaker (2). 2. Measure resistance between instrument panel wiring harness circuit 27 (1) and 27C (3) plug pins. 3. Does multimeter read 0 ohms? D4YN 1. Repair instrument panel wiring harness circuit 27C/27 (WP 0312 00). 2. Verify no faults found. D5Y 1. Repair front main harness circuit 406 (WP 0312 00). 2. Verify no faults found. 0012 00-10