TM 9-2350-277-20-1
COOLANT HEATER MALFUNCTIONSContinued
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