TM 9-2350-247-20-1
COOLANT HEATER MALFUNCTIONS—Continued
0086 00
2DY
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
2DYN
1. Repair heater switch jumper lead
between terminal 21 and 14
(WP 0294 00).
2. Verify no faults found.
3DY
1. Replace heater ON/OFF/START switch (WP 0472 00).
2. Verify no faults found.
EY
1. Remove heater harness plug (1) from heater control jack (2).
2. Measure voltage between heater control jack (2) pin A (3) and
ground with HEATER switch on START.
3. Does multimeter read more than 17 volts?
YES
NO
GO TO FY (PAGE 0086 00-7)
0086 00-6
