TM 5-3805-263-14&P-3
ELECTRICAL TROUBLESHOOTING
EMS PANEL
PROBLEM A. No Indicator ON; Master Fault Light OFF.
Possible Causes: a.
An open in the circuit from the battery to the operator panel.
b.
An open in the ground circuit to the operator panel.
c.
Low battery voltage.
d.
Bad operator panel.
TROUBLESHOOTING
1. Turn on dome light or rear flood light.
If Light Turns ON
If Light Does Not Turn ON
Disconnect switch is good and power circuit is con-
Go to Step 2.
tinuous to the fuse panel. Go to Step 3.
2. Check battery voltage.
If Battery Voltage Is Good
If Battery Voltage is Low
Use the simplified schematics to check the main
Put a charge on, or make a replacement of batteries.
power circuit for an open.
3. Disconnect the harness plug from the operator panel. Check for voltage at
connection 1 of the harness plug with a voltage tester or a digital multimeter.
Connect the clip of the tester to machine ground and put the point of the
tester in connection 1. There must be at least 18 volts. A Multimeter can be
used to measure exact voltage.
Voltage
No Voltage
Turn the engine over with the starter for 10 seconds,
Check the fuse for the operator panel. (EMS)
with the fuel shut off.
If fuse is good, use simplified schematic to check
If engine turns over, batteries are good
power circuit to the operator panel.
Go to Step 5
If fuse is bad, go to Step 4.
If engine does not turn over enough, put a charge on
or make a replacement of the batteries.
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