TM 5-3805-258-24-19 5 0 B O P E R A T O R ’ S S T A T I O NE L E C T R I C A L T R O U B L E S H O O T I N GPROBLEM A. ALL Indicator OFF; Master Fault Light OFF.Possible Causes: a. An open in the circuit from the battery to the operatorpanel.b. An open in the ground circuit to the operator panel.c. Low battery voltage.d. Bad operator panel.TROUBLESHOOTING1. Turn on any vehicle light.If Light Turns ONIf Light Does Not Turn ONDisconnect switch, main power key switch, and mainIGo to Step 2.power relay work correctly. Go to step 3.2. Check battery voltageIf Battery Voltage Is GoodIf Battery Voltage Is LowUse the simplified schematics to check the mainPut 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 forvoltage at Socket 1 of the harness plug connector A with a 5P7277 VoltageTester. Connect the clip of the tester to machine ground and put the point of thetester in Socket 1. There must be at least 18 volts.VoltageNO VoltageTurn 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 theIf 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 onor make a replacement of the batteries.4-103
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