TM 5-3805-280-24-1
Sub-System Diagnostics
ENGINE COOLANT
With engine cool, turn key switch ON.
YES: Indicator is OK. Go
TEMPERATURE
to next check.
INDICATOR LIGHT (H16)
Observe engine temperature indicator.
CHECK
NO: If indicator does not
come ON, check indicator
Does indicator come ON when key switch is turned ON,
lamp.
then go OFF 2--3 seconds later?
If indicator does not go
OFF, go to next check.
T101686 UN29AUG96
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ENGINE COOLANT
Disconnect harness from engine coolant temperature
YES: Engine coolant
TEMPERATURE SWITCH
switch.
temperature switch has
9015
(B3) CHECK
failed. Replace.
15
If engine coolant temperature indicator was ON, did it go
62
OFF with harness disconnected and key switch ON?
NO: Check harness.
If indicator was OFF, connect a jumper wire between
harness connector pins.
T7470AM
UN05MAR91
Does indicator come ON when key switch is ON?
1/1
CHARGE AIR
Turn key switch ON.
YES: Indicator is OK. Go
TEMPERATURE
to next check.
INDICATOR LIGHT (H15)
Observe charge air temperature indicator.
CHECK
NO: If indicator does not
come ON, check indicator
Does indicator come ON when key switch is turned ON,
lamp.
then go OFF 2--3 seconds later?
If indicator does not go
OFF, go to next check.
T113692 UN24FEB98
1/1
CHARGE AIR
Disconnect harness from charge air temperature switch.
YES: Charge air
TEMPERATURE SWITCH
temperature switch has
(B12) CHECK
failed. Replace.
If indicator was ON, did it go OFF with harness
disconnected and key switch ON?
NO: Check harness.
If indicator was OFF, connect a jumper wire between
harness connector pins.
Does indicator come ON when key switch is ON?
T7470AM
UN05MAR91
1/1
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