TM 9-2320-365-20-1
2-834
e73. PERSONNEL HEATER FAN DOES NOT OPERATE (CONT)
YES
NO
2.
YES
NO
3.
Circuit breaker OK.
Main instrument panel
controls and indicators OK.
Is continuity present
between heater fan control
switch orange wire and a
known good ground?
This question eliminates
possible problems and
determines where
troubleshooting continues.
Is continuity present
between heater fan control
switch terminals?
If continuity is not present,
heater fan control switch is
faulty. If continuity is
present, heater is faulty.
KNOWN INFO
POSSIBLE PROBLEMS
Faulty heater fan control
switch.
Faulty personnel heater.
Faulty dashboard cable
assembly.
TEST OPTIONS
Continuity Test or
STE/ICE-R #91
REASON FOR QUESTION
Go to step 4 of this fault.
KNOWN INFO
Circuit breaker OK.
Main instrument panel
controls and indicators OK.
Dashboard cable
assembly OK.
POSSIBLE PROBLEMS
Faulty heater fan control
switch.
Faulty personnel heater.
TEST OPTIONS
Continuity Test or
STE/ICE-R #91
REASON FOR QUESTION
Replace heater fan
control switch (para 18-10).
Replace or repair
personnel heater
(para 18-9).
