TM 5-3805-263-14&P-3
TESTING AND ADJUSTING
e) With engine OFF, turn disconnect switch OFF. Re-move
black wire from the small terminal on the mag-netic switch.
Check coil resistance between the two small terminals. If
coil resistance measures less than 5 ohms or greater than
10 ohms, replace the magnetic switch.
f) With engine OFF, measure the voltage drop across the two
large terminals on the magnetic switch while holding the
Automatic/ Manual switch in the Manual position. If the
voltage drop measures more than 2 volts, the magnetic
switch is bad. Make a replacement of the magnetic switch.
g) Troubleshoot circuit wiring (check continuity).
h) Troubleshoot circuit wiring (check continuity).
i) Troubleshoot circuitry wiring (check continuity).
j) With engine stopped and disconnect switch OFF, remove
electric motor from the pump. Insert screw-driver into
slotted motor shaft and rotate. If motor shaft turns freely,
check if motor runs by turning disconnect switch ON and
moving the Automatic/ Manual switch to the Manual position
for only a moment. If motor does not run, check for battery
voltage across the motor terminals with the Automatic/
Manual switch in the Manual position. If there is 18 volts or
more across the motor terminals and the motor does not
run, make a replacement of the motor.
k) With engine stopped and disconnect switch OFF, remove
electric motor from pump. Check if pump shaft turns freely.
If shaft does not turn freely, make a replacement of the
pump.
l) If above troubleshooting steps check OK, make a
replacement of electronic control module.
PROBLEM 3
SYMPTOMS:
EMS steering LED does not FLASH during 3 second power up
test.
Possible Causes:
A. Electrical circuit from electronic control module connector
socket X2 to EMS panel shorted to ground.
B. Bad control module.
C. Bad EMS panel.
Troubleshooting:
a) Troubleshoot circuit for short to ground.
b) If above items OK, replace electronic control module.
c) Refer to EMS test procedure in Operators Station and
Electrical System.
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