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Engine-Codes – Generic – B2249

B2249 Code - Head Lamp Relay Coil Short To Battery

Quick Answer

The diagnostic trouble code B2249 indicates that there is a headlamp relay coil short to the battery in the vehicle's electrical system. Common causes include Short circuit in the wiring harness, Faulty headlamp relay, Malfunctioning headlight switch. 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
B2249 indicates Head Lamp Relay Coil Short To Battery.
Common causes
Common causes include Short circuit in the wiring harness, Faulty headlamp relay, Malfunctioning headlight switch.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code B2249 Description

The diagnostic trouble code B2249 indicates that there is a headlamp relay coil short to the battery in the vehicle's electrical system. The headlamp relay is responsible for controlling the operation of the headlights in the vehicle. When the relay coil is shorted to the battery, it means that there is an unintended connection between the relay coil and the battery, causing the relay to stay on even when it should be off. This can lead to the headlights staying on constantly, draining the battery and potentially causing overheating or damage to the electrical system.

OBDII Code B2249 - Head Lamp Relay Coil Short To Battery
B2249 Code - Head Lamp Relay Coil Short To Battery

Common Causes of B2249

  1. Short circuit in the wiring harness.
  2. Faulty headlamp relay.
  3. Malfunctioning headlight switch.
  4. Electrical system issues in the vehicle.

Symptoms of B2249

  1. Headlights staying on constantly, even when the vehicle is turned off.
  2. Drained battery due to constant power supply to the headlights.
  3. Overheating of the headlamp relay.
  4. Flickering headlights or intermittent operation of the headlights.

How to Fix B2249

  1. Diagnose the root cause of the issue by performing a thorough inspection of the headlamp relay, wiring harness, and headlight switch.
  2. Test the headlamp relay and wiring for continuity and proper operation.
  3. Replace the faulty headlamp relay if necessary.
  4. Repair any damaged wiring or connections in the electrical system.
  5. Test the headlights and relay operation after repairs to ensure proper functioning.

Cost to Fix B2249

The cost of repairing a headlamp relay coil short to the battery can vary depending on the extent of the damage and the specific components that need to be replaced. On average, the cost of parts for this repair can range from $50 to $150, while the labor costs can range from $100 to $200. Overall, the total repair cost for this issue could range from $150 to $350. Keep in mind that labor rates and part prices can vary based on location, vehicle make and model, and the specific repair shop. It's recommended to obtain quotes from different repair shops to get a more accurate estimate for this repair.

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Code B2249 Information for Specific Makes

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 B2249 Code

1. What are the common symptoms of OBDII code B2249 (Head Lamp Relay Coil Short To Battery)?

The common symptoms of this code may include malfunctioning or non-working headlamps, flickering headlights, or headlamps that stay on even when the vehicle is turned off.

2. What are the possible causes of OBDII code B2249?

Possible causes of this code could be a short circuit in the headlamp relay coil to the battery, a faulty headlamp relay, damaged wiring, or a malfunctioning headlamp switch.

3. How can I diagnose the issue related to OBDII code B2249?

To diagnose the issue, you can use a diagnostic scanner to read the trouble codes, inspect the headlamp relay and associated wiring for any visible damage, and perform a continuity test to check for short circuits.

4. Can I still drive my vehicle with OBDII code B2249 present?

It is not recommended to drive your vehicle with this code present, as it can affect your visibility on the road and compromise safety. It's best to address the issue promptly.

5. How can I repair OBDII code B2249 (Head Lamp Relay Coil Short To Battery)?

To repair this code, you may need to replace the headlamp relay, repair any damaged wiring, and clear the trouble codes using a diagnostic scanner. Ensure all connections are secure and functioning properly.

6. Is it possible for a DIY enthusiast to fix OBDII code B2249?

Depending on your level of automotive repair knowledge and experience, you may be able to fix this code as a DIY project. Just make sure to follow the manufacturer's guidelines and use the appropriate tools.

7. Will resetting the trouble codes make OBDII code B2249 go away permanently?

Resetting the trouble codes may temporarily clear the code, but if the underlying issue causing the code is not addressed, it is likely to reappear. It's important to diagnose and fix the root cause of the problem.

8. Can extreme weather conditions cause OBDII code B2249 to trigger?

While extreme weather conditions may not directly cause this specific OBDII code, they can exacerbate existing electrical issues in the vehicle, potentially leading to problems like a headlamp relay coil short to battery.

9. How much does it typically cost to repair OBDII code B2249 at a mechanic or dealership?

The cost of repairing this code can vary depending on the labor rates in your area, the extent of the damage, and the cost of parts needed. It's advisable to obtain quotes from different mechanics or dealerships for an accurate estimate.

10. Are there any preventive measures to avoid OBDII code B2249 in the future?

Regularly inspecting and maintaining your vehicle's electrical system, including the headlamp relay and wiring, can help prevent issues like OBDII code B2249. Addressing any electrical problems promptly can also help avoid more serious issues down the line.

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