AutoCodes – Generic – B1D03

B1D03 Code - Right High Beam Circuit Short

Quick Answer

The Steering Column Control Module (SCCM) monitors input from the multifunction and headlamp switches. Common causes include Faulty Right High Beam Bulb, Right High Beam Bulb harness is open or shorted, Right High Beam Bulb circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B1D03 indicates Right High Beam Circuit Short.
Common causes: Common causes include Faulty Right High Beam Bulb, Right High Beam Bulb harness is open or shorted, Right High Beam Bulb circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 8,692

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 26, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B1D03 Description

The Steering Column Control Module (SCCM) monitors input from the multifunction and headlamp switches. When the headlamp switch is in the HEADLAMPS ON position and the multifunction switch is placed in the HIGH BEAM position, the SCCM sends a message to the Body Control Module (BCM) over the High Speed Controller Area Network (HS-CAN), indicating a high beam request. The BCM then provides voltage to the high beams. The BCM provides an overload protection of the high beam output circuits. When an excessive current draw is detected, the BCM disables the affected high beam circuit driver. The Instrument Panel Cluster (IPC) also receives a message over the HS-CAN to illuminate the high beam indicator when a request for the high beams is received. This Diagnostic Trouble Code (DTC) sets when the BCM detects a short to ground or open from the RH high beam output circuit.

OBDII Code B1D03 - Right High Beam Circuit Short - AutoCodes.com — B1D03 Code - Right High Beam Circuit Short

What does this mean?

What are the Possible Causes of the DTC B1D03?

Faulty Right High Beam Bulb
Right High Beam Bulb harness is open or shorted
Right High Beam Bulb circuit poor electrical connection
Faulty Steering Column Control Module (SCCM)

How to Fix the DTC B1D03?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

B1D03:11 Right High Beam Circuit Short To Ground
B1D03:15 Right High Beam Circuit Short To Battery or Open

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1D03 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B1D03 code?

Need more information on how to fix the B1D03 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1D03 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1D03 Ford — Right High Beam Circuit Short
B1D03 Lincoln — Right High Beam Circuit Short
B1D03 Mercury — Right High Beam Circuit Short

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1D03 Code

1. What are the common symptoms of OBDII code B1D03 (Right High Beam Circuit Short)?

- The common symptoms include the right high beam not working, the high beam indicator not lighting up, and potential issues with other lighting functions on the vehicle.

2. What are the possible causes of OBDII code B1D03 (Right High Beam Circuit Short)?

- The code B1D03 can be triggered by a short circuit in the wiring harness leading to the right high beam headlight, a faulty high beam bulb, or a malfunctioning high beam relay.

3. How can I diagnose the OBDII code B1D03 (Right High Beam Circuit Short)?

- Diagnosing this code typically involves visually inspecting the wiring harness for any visible damage, testing the high beam bulb for continuity, and checking the high beam relay for proper operation.

4. Can a blown fuse cause OBDII code B1D03 (Right High Beam Circuit Short)?

- Yes, a blown fuse in the high beam circuit can also trigger the B1D03 code as it disrupts the electrical flow to the right high beam headlight.

5. How can I repair OBDII code B1D03 (Right High Beam Circuit Short)?

- Repairing this code may involve fixing any damaged wiring in the high beam circuit, replacing a faulty high beam bulb, or swapping out a defective high beam relay.

6. Is it safe to continue driving with OBDII code B1D03 (Right High Beam Circuit Short)?

- It is not recommended to drive with the B1D03 code as it can affect visibility at night or in adverse weather conditions, compromising your safety and the safety of others on the road.

7. Can a DIY enthusiast fix OBDII code B1D03 (Right High Beam Circuit Short)?

- Depending on the cause of the code, a DIY enthusiast with basic automotive knowledge and tools may be able to address issues like replacing a high beam bulb or repairing a damaged wire. However, complex electrical problems may require professional assistance.

8. Will resetting the OBDII system clear the B1D03 code (Right High Beam Circuit Short)?

- Resetting the OBDII system may clear the B1D03 code temporarily, but if the underlying issue causing the code is not fixed, it is likely to reappear upon detection during the next drive cycle.

9. How do I prevent OBDII code B1D03 (Right High Beam Circuit Short) from recurring?

- To prevent the B1D03 code from recurring, it is essential to address any underlying issues promptly, perform regular maintenance checks on the lighting system, and avoid overloading the electrical circuits.

10. Can extreme weather conditions contribute to triggering OBDII code B1D03 (Right High Beam Circuit Short)?

- Yes, extreme weather conditions like heavy rain, snow, or temperature fluctuations can potentially exacerbate existing electrical issues in the high beam circuit, leading to the triggering of the B1D03 code.