AutoCodes – Lincoln – B1D02 Lincoln

B1D02 Lincoln 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 Lincoln 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 869

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

What does this mean?

What are the Possible Causes of the DTC B1D02 Lincoln?

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 Lincoln?

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 Lincoln 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 Lincoln Code

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

The code B1D02 indicates a short circuit in the left high beam circuit, which prevents the proper operation of the left high beam light.

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

Symptoms include the left high beam not functioning, flickering lights, or the high beam indicator not illuminating properly on the dashboard.

3. What causes the B1D02 code to appear in a Lincoln?

The code is typically caused by damaged wiring, a faulty high beam bulb, a malfunctioning headlight assembly, or a defective Body Control Module (BCM).

4. Can a blown fuse cause the B1D02 code?

Yes, a blown fuse in the headlight circuit can cause this code, as it may indicate an underlying short circuit or electrical issue.

5. How do I diagnose the B1D02 code on my Lincoln?

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

6. Can I still drive my Lincoln with the B1D02 code active?

While the vehicle is drivable, driving without a functioning left high beam can be unsafe, especially at night or in low-visibility conditions.

7. How do I fix the B1D02 code on my Lincoln?

Repairs may include replacing the left high beam bulb, repairing damaged wiring, cleaning corroded connectors, or replacing the headlight assembly or BCM if necessary.

8. How much does it cost to repair the B1D02 code in a Lincoln?

Repair costs vary depending on the issue but can range from $20 for a new bulb to several hundred dollars for wiring or BCM repairs.

9. Can a faulty BCM cause the B1D02 code in a Lincoln?

Yes, a malfunctioning Body Control Module can trigger the B1D02 code if it fails to properly control the high beam circuit.

10. Do I need a professional to repair the B1D02 code on my Lincoln?

Simple issues like replacing a bulb or fixing wiring can be done by a DIYer, but more complex electrical problems may require professional diagnosis and repair.