AutoCodes – Ford – B1D02 Ford

B1D02 Ford Code - Left High Beam Circuit Short

Quick Answer

The Steering Column Control Module (SCCM) monitors input from the multifunction and headlamp switches. Common causes include Faulty Left High Beam Bulb, Left High Beam Bulb harness is open or shorted, Left 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: B1D02 Ford indicates Left High Beam Circuit Short.
Common causes: Common causes include Faulty Left High Beam Bulb, Left High Beam Bulb harness is open or shorted, Left 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 9,196

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 B1D02 Ford 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 LH high beam output circuit.

OBDII Code B1D02 Ford - Left High Beam Circuit Short - AutoCodes.com — B1D02 Ford Code - Left High Beam Circuit Short

What does this mean?

What are the Possible Causes of the DTC B1D02 Ford?

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

How to Fix the DTC B1D02 Ford?

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

B1D02:11 Left High Beam Circuit Short To Ground
B1D02:15 Left High Beam Circuit Short To Battery or Open

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1D02 Ford 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.

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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 B1D02 Ford Code

1. What does the OBDII code B1D02 mean on a Ford vehicle?

The B1D02 code indicates a short circuit in the left high beam circuit, which may prevent the left high beam from functioning properly.

2. What are the symptoms of the B1D02 code in a Ford?

Common symptoms include the left high beam not working, flickering lights, or the headlight staying on even when turned off.

3. What causes the B1D02 code to appear?

This code is typically caused by damaged wiring, a shorted high beam bulb, a faulty headlight assembly, or a malfunction in the control module.

4. Can I drive my Ford if the B1D02 code is active?

Yes, but driving with a non-functioning high beam can reduce visibility at night and may be unsafe or illegal in certain conditions.

5. How do I diagnose the B1D02 code?

Start by inspecting the left high beam bulb, wiring, and connectors for signs of damage or corrosion. Use a multimeter to check for continuity and shorts in the circuit.

6. How do I fix the B1D02 code on my Ford?

Repairs might include replacing the high beam bulb, repairing or replacing damaged wiring, or replacing the headlight assembly or control module if necessary.

7. Can a blown fuse cause the B1D02 code?

Yes, a blown fuse in the headlight circuit can trigger the code, so check all related fuses before performing more complex diagnostics.

8. Do I need to reprogram the control module after fixing the B1D02 code?

In most cases, reprogramming is not required, but clearing the code with an OBDII scanner after repairs is necessary.

9. How much does it cost to fix the B1D02 code?

The cost varies depending on the root cause. Replacing a bulb can cost $20-$50, while repairing wiring or replacing a module can range from $100 to $500 or more.

10. Can the B1D02 code be prevented?

Regular inspection and maintenance of the headlight wiring, connectors, and bulbs can help prevent issues that may trigger this code.