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 COOLANT HEATER MALFUNCTIONS — Continued 0070 00 BY 1. Remove indicator cover lens (1) and bulb (2). 2. Measure resistance between bulb center contact and base. 3. Does multimeter read less than 5 ohms? BYN 1. Replace indicator bulb (WP 0648 00). 2. Verify no faults found. B2Y 1. Remove rear main harness circuit 400A plug (1) from control box jack (2). 2. Measure voltage between rear main harness circuit 400A plug (1) pin and ground. 3. Does multimeter read more than 17 volts? B2YN 1. Repair rear main harness circuit 400 between master switch and heater control box (WP 0312 00). 2. Verify no faults found. 0070 00-3