TM-9-2350-247-20-1 Unit Maintenance Manual Volume 1 M548A1 M548A3 Tracked Cargo Carrier Download
Page 427 of 870
TM 9-2350-247-20-1 VEHICLE COMPARTMENT HEATER MALFUNCTIONS — Continued 0085 00 FY 1. Remove heater control box (WP 0431 00). 2. Measure resistance between lead ends of heater control jack (1) pin A (2) and RUN-OFF-START switch terminal 14 (3). 3. Does multimeter read 0 ohms? FYN 1. Replace faulty lead (WP 0294 00). 2. Verify no faults found. 2FY 1. Replace heater RUN-OFF-START switch (WP 0472 00). 2. Verify no faults found. GY 1. Check heater exhaust. 2. Is heater exhaust cold? GYN 1. Defective flame detector switch. 2. Notify your supervisor. 0085 00-9 Change 1