Headlamp High Beam Signal Circuit
Table of contents
B3857 BUICK Possible Causes
- Faulty Headlamp High Beam
- Headlamp High Beam harness is open or shorted
- Headlamp High Beam circuit poor electrical connection
- Faulty Body Control Module (BCM)
How do I fix code B3857 BUICK?
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’s pins.
Cost of diagnosing the B3857 BUICK code
The cost of diagnosing the B3857 BUICK code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
B3857 BUICK Description
The Body Control Module (BCM) monitors the Headlamp High Beam Signal circuit by verifying the high beam input. The Diagnostic Trouble Code (DTC) sets when the BCM detects a short to voltage, short to ground or an open in the high beam headlamp signal circuit.