AutoCodes – Lincoln – B1348 Lincoln

B1348 Lincoln Code - Heated Backlite Relay Circuit Open

Quick Answer

When the rear defrosts switch on the climate control assembly is pressed, a ground signal is sent to the Smart Junction Box (SJB) on the circuit. Common causes include Faulty Heated Rear Window Relay, Faulty Heated Rear Window Switch, Faulty Heated Rear Window Grid. 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: B1348 Lincoln indicates Heated Backlite Relay Circuit Open.
Common causes: Common causes include Faulty Heated Rear Window Relay, Faulty Heated Rear Window Switch, Faulty Heated Rear Window Grid.
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 834

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 Mar 15, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1348 Lincoln Description

When the rear defrosts switch on the climate control assembly is pressed, a ground signal is sent to the Smart Junction Box (SJB) on the circuit. The SJB then grounds circuit. This energizes the heated rear window relay, allowing voltage to be supplied to the heated rear window grid through the circuit. The OBDII code sets when the Heated Backlite Input is not to factory specifications.

OBDII Code B1348 Lincoln - Heated Backlite Relay Circuit Open - AutoCodes.com — B1348 Lincoln Code - Heated Backlite Relay Circuit Open

What does this mean?

What are the Possible Causes of the DTC B1348 Lincoln?

Faulty Heated Rear Window Relay
Faulty Heated Rear Window Switch
Faulty Heated Rear Window Grid
Faulty Smart Junction Box (SJB)

How to Fix the DTC B1348 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1348 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.

Need more information about the B1348 Lincoln code?

Need more information on how to fix the B1348 Lincoln code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1348 Lincoln code diagnosed by a professional: Find a repair shop in your area

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 B1348 Lincoln Code

1. What are the common symptoms of OBDII code B1348 for a Lincoln, indicating a Heated Backlite Relay Circuit Open?

- The common symptoms include the heated backlite not functioning, rear defroster not working, and the rear window staying foggy or icy.

2. What are the possible causes of the OBDII code B1348 in a Lincoln related to the Heated Backlite Relay Circuit Open?

- The code B1348 can be caused by a faulty relay, damaged wiring in the backlite circuit, or a malfunctioning backlite heater grid.

3. How can I diagnose the OBDII code B1348 in my Lincoln for the Heated Backlite Relay Circuit Open?

- You can diagnose the code B1348 by inspecting the relay, checking the wiring for any damage, and testing the backlite heater grid for continuity.

4. Is it safe to drive my Lincoln with the OBDII code B1348 due to a Heated Backlite Relay Circuit Open?

- It is generally safe to drive the vehicle with this code, but it is recommended to get it repaired to ensure the rear defroster functions properly.

5. Can I repair the OBDII code B1348 related to the Heated Backlite Relay Circuit Open in my Lincoln myself?

- If you have experience with automotive electrical systems, you may be able to repair the issue yourself by replacing the faulty relay or repairing damaged wiring.

6. Are there any temporary solutions to fix the OBDII code B1348 for the Heated Backlite Relay Circuit Open in my Lincoln?

- You can temporarily bypass the relay by directly connecting the backlite to power, but this is not a recommended long-term solution and may cause other issues.

7. What is the typical cost to repair the OBDII code B1348 in a Lincoln caused by a Heated Backlite Relay Circuit Open?

- The cost of repairing this code can vary depending on the exact cause, but it may range from $100 to $300 for parts and labor.

8. Will resetting the OBDII code B1348 related to the Heated Backlite Relay Circuit Open in my Lincoln make it go away permanently?

- Resetting the code may temporarily clear the error, but if the underlying issue is not fixed, the code is likely to reappear after driving the vehicle.

9. Can extreme weather conditions affect the occurrence of the OBDII code B1348 in a Lincoln due to a Heated Backlite Relay Circuit Open?

- Yes, extreme cold or hot weather can exacerbate issues with the backlite relay circuit, leading to the triggering of the B1348 code.

10. How long does it typically take to repair the OBDII code B1348 caused by a Heated Backlite Relay Circuit Open in a Lincoln?

- The repair time can vary depending on the exact cause and the availability of parts, but it usually takes 1-2 hours for a professional mechanic to diagnose and fix the issue.