AutoCodes – Mercury – B2047 Mercury

B2047 Mercury Code - Right Rear Stop Lamp Circuit Open

Quick Answer

When the brake pedal is applied, the stoplamp switch routes voltage to the Smart Junction Box (SJB) and the high mounted stoplamp. Common causes include Faulty High Mounted Stoplamp, High Mounted Stoplamp harness is open or shorted, High Mounted Stoplamp 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: B2047 Mercury indicates Right Rear Stop Lamp Circuit Open.
Common causes: Common causes include Faulty High Mounted Stoplamp, High Mounted Stoplamp harness is open or shorted, High Mounted Stoplamp 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 486

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 Feb 26, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2047 Mercury Description

When the brake pedal is applied, the stoplamp switch routes voltage to the Smart Junction Box (SJB) and the high mounted stoplamp. When the SJB detects the brake pedal is applied, the SJB provides voltage to the Left (LH) and Right (RH) rear stoplamps. The Diagnostic Trouble Code (DTC) sets when the SJB detects an open from the RH rear stop/turn lamp voltage supply circuit.

OBDII Code B2047 Mercury - Right Rear Stop Lamp Circuit Open - AutoCodes.com — B2047 Mercury Code - Right Rear Stop Lamp Circuit Open

What does this mean?

What are the Possible Causes of the DTC B2047 Mercury?

Faulty High Mounted Stoplamp
High Mounted Stoplamp harness is open or shorted
High Mounted Stoplamp circuit poor electrical connection
Faulty Bulb Holder
Faulty Smart Junction Box (SJB)

How to Fix the DTC B2047 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 B2047 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.

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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 B2047 Mercury Code

1. What does the OBDII code B2047 mean on a Mercury?

The B2047 code indicates an open circuit in the right rear stop lamp, meaning the vehicle's system has detected a problem with the wiring or bulb for that lamp.

2. What are the symptoms of the B2047 code on a Mercury?

Common symptoms include the right rear brake light not working, a warning light on the dashboard, and possibly a "Check Lamp" message.

3. What causes the B2047 code to appear?

Possible causes include a burned-out brake light bulb, damaged wiring, a corroded connector, or a faulty stop lamp socket.

4. Can I still drive my Mercury with the B2047 code active?

While the vehicle may still be drivable, it is unsafe to drive without a functioning right rear brake light, as it reduces visibility to other drivers and could lead to a traffic violation.

5. How do I diagnose the B2047 code on my Mercury?

Start by checking the right rear stop lamp bulb for damage, inspect the wiring and connectors for corrosion or breaks, and use a multimeter to test for continuity in the circuit.

6. How do I fix the B2047 code on a Mercury?

Fixes may include replacing the stop lamp bulb, repairing or replacing damaged wiring, cleaning corroded connectors, or replacing a faulty lamp socket.

7. Can a blown fuse cause the B2047 code?

While the code specifically relates to the right rear stop lamp circuit, a blown fuse could potentially affect the circuit and should be checked during diagnosis.

8. How much does it cost to repair the B2047 code on a Mercury?

The cost depends on the issue, but replacing a bulb may cost $20 or less, while repairing wiring or a socket could range from $50 to $150.

9. Will clearing the B2047 code fix the problem permanently?

No, clearing the code will not fix the underlying issue. The problem with the right rear stop lamp circuit must be repaired to prevent the code from returning.

10. Can a faulty brake light switch cause the B2047 code?

While it is unlikely, a faulty brake light switch could potentially cause issues with the stop lamp circuit and should be tested if other components appear functional.