Here is the illustration show how to solve Scania truck ALM Alarm system ALM 578 trouble code bodybuilder connection indicator for activated alarm, short circuit.
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Bodybuilder connection indicator for activated alarm, short circuit
Error identification
The bodybuilder connection indicator for activated alarm is short-circuited to voltage supply.
Cause
Fault in wake-up signal harness-to-component connectors or cable harness for bodybuilder connection indicator for activated alarm.
Internal fault in ALM control unit E7.
Notes
If the alarm system is activated when the fault code is generated the siren will sound.
Symptom
Bodybuilder connection indicator for activated alarm does not work.
Action
Disconnect the harness-to-component connector to ALM control unit pin B11.
Measure for short circuits throughout the cable harness.
If there are a number of harness-to-component connectors between the wake-up signal and the ALM control unit, disconnect them and measure in order to isolate the fault.
If the fault is not in the cable harness it is probably an internal fault in ALM control unit E7.
For more information about Scania truck,please refer to:Scania Trouble Repair.
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