Engine-CodesFord – B1349 Ford

B1349 Ford Code - Heated Backlite Relay Short to Battery

Quick Answer

The B1349 Ford code indicates that there is a short to battery in the heated backlite relay circuit. Common causes include Short circuit in the wiring of the backlite relay, Faulty backlite relay, Corrosion or damage to the relay connector. 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
B1349 Ford indicates Heated Backlite Relay Short to Battery.
Common causes
Common causes include Short circuit in the wiring of the backlite relay, Faulty backlite relay, Corrosion or damage to the relay connector.
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.
Table of contents Created and updated by William Orellana on Sep 06, 2024
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Code B1349 Ford Description

The B1349 Ford code indicates that there is a short to battery in the heated backlite relay circuit. The heated backlite relay is responsible for controlling the rear window defogger, which helps to clear condensation and ice from the rear window. When this relay is shorted to the battery, it can cause the rear window defogger to malfunction or not work at all. This can affect visibility while driving in cold or wet weather conditions, posing a safety hazard.

OBDII Code B1349 Ford - Heated Backlite Relay Short to Battery
B1349 Ford Code - Heated Backlite Relay Short to Battery

Common Causes of B1349 Ford

  1. Short circuit in the wiring of the backlite relay
  2. Faulty backlite relay
  3. Corrosion or damage to the relay connector
  4. Electrical issues in the vehicle's wiring harness
  5. Faulty rear window defogger grid

Symptoms of B1349 Ford

  1. Rear window defogger not working
  2. Backlite relay fuse blowing repeatedly
  3. Rear window taking longer to defog
  4. Burning smell coming from the dashboard
  5. Rear window defogger working intermittently

How to Fix B1349 Ford

  1. Begin by diagnosing the exact location of the short to battery in the heated backlite relay circuit using a multimeter.
  2. Inspect the wiring and connector for any signs of damage, corrosion, or wear. Repair or replace as necessary.
  3. Test the backlite relay for proper functionality. If faulty, replace the relay with a new one.
  4. Verify that the rear window defogger grid is intact and functioning properly.
  5. Clear any trouble codes from the vehicle's computer and test the rear window defogger to ensure it is working correctly.

Cost to Fix B1349 Ford

The cost to repair a B1349 Ford code can vary depending on the specific cause of the issue. In general, the price for parts such as a new backlite relay can range from $50 to $150, while labor costs can add an additional $100 to $200. Overall, the total repair cost for this issue could be around $150 to $350. However, it's important to note that prices can fluctuate based on location and the type of vehicle being serviced. Be sure to consult with a professional mechanic for a more accurate estimate.

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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 B1349 Ford Code

1. What are common symptoms of OBDII code B1349 Ford (Heated Backlite Relay Short to Battery)?

Common symptoms include a non-functional rear defroster, a blown fuse related to the rear defroster circuit, and potentially a lit warning light on the dashboard.

2. What causes the OBDII code B1349 Ford (Heated Backlite Relay Short to Battery)?

The code B1349 typically indicates a short to battery in the heated backlite relay circuit, which can be caused by a faulty relay, damaged wiring, or a malfunctioning backlite grid.

3. How can I diagnose the issue related to code B1349 Ford (Heated Backlite Relay Short to Battery)?

To diagnose the issue, you can use a multimeter to check the continuity of the backlite relay circuit, inspect the wiring for any visible damage, and test the relay for proper functioning.

4. Can I drive my vehicle with OBDII code B1349 Ford (Heated Backlite Relay Short to Battery)?

It is generally safe to drive the vehicle with this code, but you may experience issues with the rear defroster not functioning properly, especially in cold or humid conditions.

5. How do I repair OBDII code B1349 Ford (Heated Backlite Relay Short to Battery)?

Repairing the issue involves locating the faulty relay or damaged wiring, replacing the relay if necessary, and ensuring proper connection and insulation of the wiring to resolve the short to battery.

6. Is it possible to reset the OBDII code B1349 Ford (Heated Backlite Relay Short to Battery) without fixing the underlying issue?

While you can clear the code with an OBDII scanner, it will likely reappear if the root cause of the short to battery in the heated backlite relay circuit is not addressed.

7. Can extreme weather conditions contribute to triggering OBDII code B1349 Ford (Heated Backlite Relay Short to Battery)?

Yes, extreme cold or humid conditions can exacerbate issues with the rear defroster circuit, potentially leading to a short to battery and triggering the B1349 code.

8. How much does it typically cost to repair OBDII code B1349 Ford (Heated Backlite Relay Short to Battery)?

The cost of repair can vary depending on the extent of the damage, but it may range from $100 to $300 for parts and labor if a relay replacement or wiring repair is needed.

9. Are there any preventive measures to avoid OBDII code B1349 Ford (Heated Backlite Relay Short to Battery)?

Regularly inspecting and maintaining the rear defroster system, avoiding overloading the circuit with aftermarket accessories, and addressing any electrical issues promptly can help prevent this code.

10. Does OBDII code B1349 Ford (Heated Backlite Relay Short to Battery affect vehicle performance?

This code typically does not affect the overall performance of the vehicle but may impact the functionality of the rear defroster system, especially in adverse weather conditions.

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