AutoCodes – Generic – B2699

B2699 Code - Right Headlamp Control Circuit

Quick Answer

When the Body Control Module (BCM) senses a request for low-beam headlamp illumination, the BCM sends a ground signal to the low-beam headlamp relay through the headlamp low-beam relay control circuit. Common causes include Faulty Right Low Beam Headlamp, Right Low Beam Headlamp harness is open or shorted, Right Low Beam Headlamp 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: B2699 indicates Right Headlamp Control Circuit.
Common causes: Common causes include Faulty Right Low Beam Headlamp, Right Low Beam Headlamp harness is open or shorted, Right Low Beam Headlamp 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 12,327

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 May 26, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B2699 Description

When the Body Control Module (BCM) senses a request for low-beam headlamp illumination, the BCM sends a ground signal to the low-beam headlamp relay through the headlamp low-beam relay control circuit. The headlamp low beam relay will apply voltage to illuminate the headlamps. The Diagnostic Trouble Code (DTC) sets when the BCM receives a command to illuminate the low beam headlamps and the headlamp low beam relay control circuit is open or shorted to voltage or when the BCM does not receive a command to illuminate the low beam headlamps and the headlamp low beam relay control circuit is shorted to ground.

OBDII Code B2699 - Right Headlamp Control Circuit - AutoCodes.com — B2699 Code - Right Headlamp Control Circuit

What does this mean?

What are the Possible Causes of the DTC B2699?

Faulty Right Low Beam Headlamp
Right Low Beam Headlamp harness is open or shorted
Right Low Beam Headlamp circuit poor electrical connection
Faulty Low Beam Headlamp Relay
Faulty Body Control Module (BCM)

How to Fix the DTC B2699?

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

B2699:01 Right Headlamp Control Circuit Short to Battery
B2699:02 Right Headlamp Control Circuit Short to Ground
B2699:04 Right Headlamp Control Circuit Open

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2699 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 B2699 code?

Need more information on how to fix the B2699 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2699 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2699 Buick — Right Headlamp Control Circuit
B2699 Cadillac — Right Headlamp Control Circuit
B2699 Chevrolet — Right Headlamp Control Circuit
B2699 GMC — Right Headlamp Control Circuit

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 B2699 Code

1. What are some common symptoms of OBDII code B2699 (Right Headlamp Control Circuit)?

- Dim or flickering right headlamp, headlamp not turning on, or warning light on the dashboard indicating headlamp issue.

2. What are the possible causes of OBDII code B2699?

- Faulty headlamp control module, damaged wiring or connectors in the headlamp circuit, or a malfunctioning headlamp bulb.

3. How can I diagnose the cause of OBDII code B2699?

- Use a multimeter to test the voltage at the headlamp connector, inspect the wiring for any visible damage, and check the headlamp control module for proper functioning.

4. Can a blown headlamp fuse trigger OBDII code B2699?

- Yes, a blown headlamp fuse can cause the right headlamp control circuit to malfunction and trigger the B2699 diagnostic trouble code.

5. What are some repair tips for resolving OBDII code B2699?

- Start by checking and replacing any blown fuses, then inspect the headlamp control module and wiring for faults, and finally replace the headlamp bulb if necessary.

6. Is it possible to clear OBDII code B2699 without fixing the underlying issue?

- Clearing the code without addressing the root cause will likely result in the code reappearing once the issue persists, so it's recommended to diagnose and fix the problem first.

7. Can a faulty battery or alternator cause OBDII code B2699 to appear?

- While unlikely, a weak battery or failing alternator could potentially affect the headlamp control circuit and trigger code B2699.

8. How important is it to address OBDII code B2699 promptly?

- Promptly addressing B2699 is crucial for maintaining proper headlamp functionality, ensuring safe driving conditions, and preventing further electrical issues in the vehicle.

9. Are there any known recalls or technical service bulletins related to OBDII code B2699?

- Check with the vehicle manufacturer or authorized service centers for any recalls or technical service bulletins related to the B2699 diagnostic trouble code affecting the right headlamp control circuit.

10. Can a DIY enthusiast repair OBDII code B2699, or is it best left to professionals?

- Depending on the level of automotive repair experience and access to tools, DIY enthusiasts may be able to diagnose and fix OBDII code B2699, but complex electrical issues should be handled by professionals for safety reasons.