Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
The cost to diagnose the B1480 Cadillac code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
The Battery Rundown Protection function allows the Body Control Module (BCM) to disable courtesy lights, cargo lights and underhood light 40 minutes after the ignition is turned off. The BCM monitors the output of the inadvertent power relay. When BCM commands the Inadvertent Power Relay on and there is no voltage at BCM connector 0.5 seconds, Diagnostic Trouble Code (DTC) will be set. DTC will not set if system voltage is not 9-16 volts. When DTC is set, courtesy lights, cargo lights, and underhood light will be disabled.
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