AutoCodes – Mercury – B1374 Mercury

B1374 Mercury Code - Illuminated Entry Relay Short To Ground

Quick Answer

The Body Control Module (BCM) monitors the Illuminated Entry Relay. Common causes include Faulty Illuminated Entry Relay, Illuminated Entry Relay harness is open or shorted, Illuminated Entry Relay 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: B1374 Mercury indicates Illuminated Entry Relay Short To Ground.
Common causes: Common causes include Faulty Illuminated Entry Relay, Illuminated Entry Relay harness is open or shorted, Illuminated Entry Relay 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 675

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 19, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1374 Mercury Description

The Body Control Module (BCM) monitors the Illuminated Entry Relay. The BCM sets the OBDII code when the Illuminated Entry Relay is not to factory specifications.

OBDII Code B1374 Mercury - Illuminated Entry Relay Short To Ground - AutoCodes.com — B1374 Mercury Code - Illuminated Entry Relay Short To Ground

What does this mean?

What are the Possible Causes of the DTC B1374 Mercury?

Faulty Illuminated Entry Relay
Illuminated Entry Relay harness is open or shorted
Illuminated Entry Relay circuit poor electrical connection

How to Fix the DTC B1374 Mercury?

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 B1374 Mercury 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 B1374 Mercury code?

Need more information on how to fix the B1374 Mercury code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1374 Mercury 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 B1374 Mercury Code

1. What are the common symptoms of OBDII code B1374 - Illuminated Entry Relay Short To Ground in a Mercury vehicle?

- Common symptoms include the interior lights not turning off, the dome light remaining on, or the courtesy lights malfunctioning.

2. What can cause the OBDII code B1374 to trigger in a Mercury?

- The code B1374 is typically triggered by a short to ground in the circuit of the illuminated entry relay, often caused by a damaged wire or a faulty relay.

3. How can I diagnose a short to ground causing the OBDII code B1374 in my Mercury?

- You can diagnose a short to ground by performing a visual inspection of the wiring harness, testing the relay, and using a multimeter to check for continuity and shorts in the circuit.

4. What are the potential risks of driving with the OBDII code B1374 active in a Mercury?

- Driving with the code B1374 active may lead to a drained battery due to the lights staying on constantly, potentially leaving you stranded.

5. Can I repair the illuminated entry relay short to ground issue triggering the OBDII code B1374 in my Mercury myself?

- If you have experience with automotive electrical systems, you may be able to repair the issue yourself by identifying and fixing the short to ground or replacing the faulty relay.

6. Is resetting the OBDII system enough to fix the B1374 code in a Mercury?

- Resetting the OBDII system may temporarily clear the code, but it will likely return if the root cause of the short to ground is not addressed.

7. How much does it typically cost to repair the illuminated entry relay short to ground issue causing the OBDII code B1374 in a Mercury?

- The cost of repair can vary depending on the extent of the damage and whether you choose to do the repair yourself or take it to a professional mechanic. It may range from a few dollars for a DIY fix to a few hundred dollars for professional repair.

8. Are there any preventive measures I can take to avoid the OBDII code B1374 in my Mercury?

- Regularly inspecting the wiring harness and components related to the illuminated entry system can help identify potential issues early and prevent the code B1374 from occurring.

9. How urgent is it to address the OBDII code B1374 - Illuminated Entry Relay Short To Ground in a Mercury?

- It is recommended to address the code promptly to avoid potential issues with the vehicle's electrical system and prevent a drained battery.

10. Can the OBDII code B1374 be a sign of other underlying electrical problems in a Mercury?

- Yes, the code B1374 may indicate broader electrical issues in the vehicle, so it's essential to thoroughly diagnose and address the root cause of the short to ground.