TM 5-3805-258-24-1
9 5 0 B O P E R A T O R ’ S S T A T I O N
E L E C T R I C A L T R O U B L E S H O O T I N G
PROBLEM A. ALL Indicator OFF; 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 any vehicle light.
If Light Turns ON
If Light Does Not Turn ON
Disconnect switch, main power key switch, and main
I
Go to Step 2.
power relay work correctly. 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 connector A from the operator panel. Check for
voltage at Socket 1 of the harness plug connector A with a 5P7277 Voltage
Tester. Connect the clip of the tester to machine ground and put the point of the
tester in Socket 1. There must be at least 18 volts.
Voltage
NO Voltage
Turn the engine over with the starter for 10 seconds,
Check the fuse for the operator panel. If fuse is good,
with the fuel shut off.
use simplified schematic to check power circuit to the
If engine turns over, batteries are good.
operator panel. If fuse is bad go to Step 4.
Go to Step 5.
If engine does not turn over enough, put a charge on
or make a replacement of the batteries.
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