Caterpillar Fault Code
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Multiple Faults
System
Electrical
Symptom
Multiple Faults
Diagnosis & fix steps
LOGIC: 5V Reference #2 Voltage High.
ACTION: Disconnect sensors on this rail one by one until the voltage stabilizes at 5.0V.
Red Seal field insights
Logic: A short to battery voltage (24V) on a sensor signal wire is "backfeeding" the reference line.
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