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 PERSONNEL HEATER MALFUNCTIONS—Continued 0086 00 BY 1. Remove heater indicator cover lens (1) and bulb (2). 2. Check continuity between bulb center contact and base. 3. Is there continuity? YES NO BYN 1. Replace heater bulb (WP 0702 00). 2. Verify no faults found. B2Y 1. Remove harness 12268797 circuit 400 plug (1) from control box jack (2). 2. Measure voltage between harness 12268797 circuit 400 plug (1) pin and ground. 3. Does multimeter read 17 volts or more? YES NO B2YN 1. Repair harness 12268797 circuit 400 between MASTER SWITCH and heater control box (WP 0382 00). 2. Verify no faults found. 0086 00-4 Change 1