Check 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 pins.
The cost to diagnose the B1973 Buick code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.
Battery guard relay supplies power to modules during controlled power usage. For 15 minutes after the ignition is turned to the LOCK position and Body Control Module (BCM) is awake, the battery guard relay output coil is grounded at the terminal of BCM. After 15 minutes, low power driver output is turned on.
The Diagnostic Trouble Code (DTC) B1973 will set when BCM detects a short to battery voltage in the battery guard relay output circuit for more than 2 seconds. When DTC B1973 is set, BCM will turn low power control output off if ignition is in LOCK position. DTC B1973 will clear when conditions for fault no longer exist or when scan tool is used. A history DTC will clear after 50 consecutive ignition cycles if conditions for fault no longer exist.
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