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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 COOLANT HEATER MALFUNCTIONS—Continued 0089 00 CY 1. Remove heater control box (WP 0736 00). 2. Measure resistance between lead ends from circuit breaker terminal 17 (1) and ON/OFF/START switch terminal 15 (2) lead ends. 3. Does multimeter read 0 ohms? YES NO CYN 1. Repair faulty lead (WP 0382 00). 2. Verify no faults found. C2Y 1. Measure resistance between lead ends from ON/OFF/START switch terminals 21 (1) and 14 (2). 2. Does multimeter read 0 ohms? YES NO C2YN 1. Repair heater switch jumper lead between terminal 21 and 14 (WP 0382 00). 2. Verify no faults found. C3Y 1. Replace heater ON/OFF/START switch (WP 0737 00). 2. Verify no faults found. 0089 00-6