TM 5-3805-280-24-1
Sub-System Diagnostics
REAR PUMP CONTROL
YES: Harness wire is OK.
PRESSURE SENSOR
Go to next step.
(B21) AND FRONT
CONTROL PRESSURE
NO: Wire or engine and
SENSOR (B22)
pump controller has
HARNESS CHECK
failed. Repair.
T118372 UN21NOV98
1--Positive Terminal
2--Sense Terminal
3--Negative Terminal
Turn key switch OFF.
Disconnect wiring harness connector from front (B22) or rear (B21) pump control
pressure sensor.
9015
Connect voltmeter to sensor harness connector pin 1 and ground.
15
84
Turn key switch ON.
Does voltmeter read 5 volts?
YES: Harness wire is OK.
Go to next step.
NO: Wire has failed.
Repair.
T118371 UN21NOV98
1--Positive Terminal
2--Sense Terminal
3--Negative Terminal
Turn key switch OFF.
Connect ohmmeter to sensor harness connector pin 3 and ground.
Does ohmmeter read continuity?
1/2
4-149