TM 5-3805-280-24-1
Sub-System Diagnostics
OVERLOAD ALARM
YES: Go to next step.
HARNESS CHECK
NO: Check wire harness.
T120685 UN25MAR99
Disconnect harness from overload alarm pressure switch
With boom positioned at either side of excavator, turn key switch ON.
With voltmeter, measure voltage at pressure switch harness connector pin 3.
Is 24 volts measured?
Turn key switch OFF.
YES: Pressure switch has 9015
failed. Replace.
15
Connect jumper wire across pressure switch harness connector pins 1 and 4.
103
NO: Harness has failed.
Turn key switch ON.
Replace.
Does overload alarm sound?
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