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Engine-Codes – Lincoln – B1347 Lincoln

B1347 Lincoln Code - Heated Backlite Relay Coil Circuit Failure

Quick Answer

The B1347 diagnostic trouble code for Lincoln vehicles indicates a failure in the Heated Backlite Relay Coil Circuit. Common causes include Damaged wiring in the relay coil circuit, Faulty heated backlite relay, Blown fuse related to the rear window defroster. 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
B1347 Lincoln indicates Heated Backlite Relay Coil Circuit Failure.
Common causes
Common causes include Damaged wiring in the relay coil circuit, Faulty heated backlite relay, Blown fuse related to the rear window defroster.
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 15, 2024
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Code B1347 Lincoln Description

The B1347 diagnostic trouble code for Lincoln vehicles indicates a failure in the Heated Backlite Relay Coil Circuit. The heated backlite relay is responsible for controlling the rear window defroster, which helps to remove frost, ice, and condensation from the rear window for improved visibility. When this relay coil circuit fails, it can lead to the rear window defroster not functioning properly, which can be a safety hazard, especially in cold or humid weather conditions.

OBDII Code B1347 Lincoln - Heated Backlite Relay Coil Circuit Failure
B1347 Lincoln Code - Heated Backlite Relay Coil Circuit Failure

Common Causes of B1347 Lincoln

  1. Damaged wiring in the relay coil circuit
  2. Faulty heated backlite relay
  3. Blown fuse related to the rear window defroster
  4. Malfunctioning switch that controls the rear window defroster

Symptoms of B1347 Lincoln

  1. Rear window defroster not working
  2. Rear window taking longer than usual to defrost
  3. Rear window defroster only working intermittently
  4. Rear window defroster producing weak heat

How to Fix B1347 Lincoln

  1. Begin by conducting a thorough inspection of the rear window defroster system to identify the root cause of the issue.
  2. Check the wiring in the relay coil circuit for any signs of damage or corrosion. Repair or replace any damaged wiring as needed.
  3. Test the heated backlite relay to determine if it is functioning properly. Replace the relay if it is found to be faulty.
  4. Inspect the fuses related to the rear window defroster and replace any blown fuses.
  5. Test the switch that controls the rear window defroster to ensure it is sending the proper signals. Replace the switch if necessary.

Cost to Fix B1347 Lincoln

The typical repair costs for addressing a Heated Backlite Relay Coil Circuit Failure in a Lincoln vehicle can range from $150 to $300, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Auto repair shops commonly charge between $80 and $150 per hour for labor, but rates may be higher in metropolitan areas or at dealerships, while independent shops may offer lower rates. It's recommended to obtain quotes from local auto repair shops 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 B1347 Lincoln Code

1. What are the common symptoms of OBDII code B1347 in a Lincoln related to Heated Backlite Relay Coil Circuit Failure?

- The common symptoms may include the heated backlite not functioning properly, rear defroster not working, and a warning light on the dashboard.

2. What are the possible causes of OBDII code B1347 in a Lincoln?

- The possible causes may include a faulty relay, damaged wiring or connectors in the heated backlite circuit, or a malfunctioning backlite control module.

3. How can I diagnose the Heated Backlite Relay Coil Circuit Failure in my Lincoln?

- You can start by visually inspecting the wiring and connectors for any visible damage, then test the relay and backlite control module using a multimeter to check for proper functioning.

4. Can I still drive my Lincoln with OBDII code B1347 triggered?

- It is generally safe to drive the vehicle with this code, but you may experience inconvenience due to the non-functioning rear defroster in certain weather conditions.

5. How serious is the Heated Backlite Relay Coil Circuit Failure issue in a Lincoln?

- While it may not directly affect the drivability of the vehicle, it is important to address this issue to ensure the proper functioning of the rear defroster for visibility and safety.

6. What are some repair tips for fixing OBDII code B1347 in a Lincoln?

- Repair tips may include checking and replacing the faulty relay, repairing damaged wiring, or replacing the backlite control module if necessary.

7. Can I reset the OBDII code B1347 in my Lincoln myself?

- Yes, you can reset the code using an OBDII scanner or by disconnecting the car battery for a few minutes. However, it is recommended to address the root cause of the issue to prevent the code from reoccurring.

8. How much does it cost to repair the Heated Backlite Relay Coil Circuit Failure in a Lincoln?

- The cost of repair can vary depending on the specific cause of the issue, but it may involve replacing a relay, repairing wiring, or replacing a control module, which can range from moderate to higher costs.

9. Are there any preventive measures to avoid OBDII code B1347 in a Lincoln in the future?

- Regularly inspecting and maintaining the rear defroster system, including checking the wiring and connectors, can help prevent issues that may trigger this particular OBDII code.

10. Can a DIY enthusiast with basic automotive knowledge fix OBDII code B1347 in a Lincoln?

- Yes, a DIY enthusiast with basic automotive knowledge may be able to diagnose and address simple causes of this code, such as replacing a faulty relay or repairing damaged wiring, with the help of online resources and manuals.

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