TM-9-2350-247-20-1 Unit Maintenance Manual Volume 1 M548A1 M548A3 Tracked Cargo Carrier Download
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TM 9-2350-247-20-1 M3 HEATER DOES NOT WORK (M548A3)—Continued 0104 00 2CY 1. Turn NBC AIR FILTER SWITCH (1) OFF (see your -10). 2. Turn MASTER SWITCH OFF. 3. Connect NBC wiring harness connector P1 to M3 heater wiring harness connector. 4. Disconnect any circuit lead 135 (2) from M3 heater (3). 5. Turn MASTER SWITCH ON. 6. Turn NBC AIR FILTER SWITCH (1) ON (see your -10). 7. Measure voltage between circuit lead 135 (2) and ground. 8. Does multimeter read 17 or more volts? YES NO 2CYN 1. Repair NBC wiring harness (WP 0294 00). 2. Verify no faults found. 3CY 1. Replace defective M3 heater (WP 0532 00). 2. Verify no faults found. 0104 00-4