TM-9-2350-247-20-1 Unit Maintenance Manual Volume 1 M548A1 M548A3 Tracked Cargo Carrier Download
Page 434 of 870
TM 9-2350-247-20-1 COOLANT HEATER MALFUNCTIONS—Continued 0086 00 4BY 1. Measure resistance between lead ends from circuit breaker terminal 17 (1) to indicator light terminal 3 (2). 2. Does multimeter read 0 ohms? YES NO 4BYN 1. Repair/replace faulty lead (WP 0294 00). 2. Verify no faults found. 5BY 1. Replace indicator light assembly (WP 0472 00). 2. Verify no faults found. CY 1. Remove heater harness plug (1) from heater control box jack (2). 2. Measure voltage between heater control box jack (2) pin C (3) and ground with HEATER switch on START. 3. Does multimeter read at more than 17 volts? YES NO GO TO DY (PAGE 0086 00-5) 0086 00-4