TM 5-3805-281-24-1
Sub-System Diagnostics
ENGINE OIL PRESSURE
Disconnect harness from engine oil pressure switch.
YES: Indicator is OK. Go
INDICATOR LIGHT (H17)
to next check.
CHECK
Turn key switch ON and observe engine oil pressure
indicator.
NO: If indicator does not
come ON, check indicator
lamp.
Does indicator come ON when key switch is turned ON,
then go OFF 2--3 seconds later?
If indicator does not go
OFF, check harness for
T101684 UN29AUG96
short.
9015
15
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ENGINE OIL PRESSURE
Connect harness to engine oil pressure switch.
YES: Go to next step.
SWITCH (B4) CHECK
Does indicator come ON with key switch ON?
NO: Check harness for
open. If harness is OK,
replace switch.
Start engine.
YES: Engine oil pressure
switch is OK.
Observe engine oil pressure indicator.
NO: Engine oil pressure
Does indicator go OFF?
switch has failed.
Replace.
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Turn key switch ON.
YES: Indicator is OK. Go
AIR FILTER
to next check.
RESTRICTION
INDICATOR LIGHT (H14)
Observe air filter restriction indicator.
CHECK
NO: If indicator does not
come ON, check indicator
Does indicator come ON when key switch is turned ON, then go OFF 2--3 seconds
lamp.
later?
If indicator does not go
OFF, go to next check.
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