AutoCodes – Mercury – B2586 Mercury

B2586 Mercury Code - High Beams Are Inoperative

Quick Answer

The Smart Junction Box (SJB) monitors the multifunction switch positions by sending out voltage reference signals to the multifunction switch through circuits. Common causes include Faulty High Beam Relay, High Beam Relay harness is open or shorted, High Beam 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: B2586 Mercury indicates High Beams Are Inoperative.
Common causes: Common causes include Faulty High Beam Relay, High Beam Relay harness is open or shorted, High Beam 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 619

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 Jan 01, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2586 Mercury Description

The Smart Junction Box (SJB) monitors the multifunction switch positions by sending out voltage reference signals to the multifunction switch through circuits. The return signal is sent through the circuit. When the multifunction switch is in the high beam position, the SJB provides a ground for the high beam relay coil (which is supplied battery voltage) through circuit. When the high beam relay is energized, power is routed to circuits from the BEC. The circuits supply power to the RH and LH high beams respectively. If a problem is detected with the circuits to the multifunction switch, the SJB will not provide a ground source for the high beam relay.

OBDII Code B2586 Mercury - High Beams Are Inoperative - AutoCodes.com — B2586 Mercury Code - High Beams Are Inoperative

What does this mean?

What are the Possible Causes of the DTC B2586 Mercury?

Faulty High Beam Relay
High Beam Relay harness is open or shorted
High Beam Relay circuit poor electrical connection
Faulty Multifunction Switch
Faulty Smart Junction Box (SJB)

How to Fix the DTC B2586 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 B2586 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 B2586 Mercury code?

Need more information on how to fix the B2586 Mercury code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 B2586 Mercury Code

1. What are the common symptoms of OBDII code B2586 in a Mercury, indicating high beams are inoperative?

The common symptoms include the high beam headlights not turning on or functioning properly when activated.

2. What are the possible causes of OBDII code B2586 in a Mercury, leading to inoperative high beams?

Possible causes may include a faulty high beam switch, a wiring issue, a blown fuse, or a malfunctioning high beam relay.

3. How can I troubleshoot OBDII code B2586 in my Mercury if the high beams are not working?

Start by checking the high beam fuse, inspecting the wiring and connections related to the high beams, and testing the high beam relay and switch for proper functionality.

4. Can a DIY enthusiast repair OBDII code B2586 in a Mercury with inoperative high beams?

Depending on the cause, some DIY enthusiasts may be able to repair the issue by replacing a faulty component like the high beam switch or a blown fuse. However, complex wiring issues may require professional assistance.

5. Is it safe to continue driving my Mercury with OBDII code B2586 if the high beams are not working?

It is not recommended to drive at night or in low visibility conditions without properly functioning high beams. Address the issue promptly to ensure your safety and the safety of others on the road.

6. How much does it typically cost to repair OBDII code B2586 in a Mercury with inoperative high beams?

The cost of repair can vary depending on the specific cause of the issue. Simple fixes like replacing a fuse may be inexpensive, while more complex repairs involving wiring or component replacement could be more costly.

7. Are there any preventive measures to avoid OBDII code B2586 in a Mercury and keep the high beams working properly?

Regularly inspecting the high beam system, including the switch, wiring, and connections, can help identify potential issues early and prevent the high beams from becoming inoperative.

8. Can extreme weather conditions or rough terrain cause OBDII code B2586 to trigger in a Mercury?

While extreme weather conditions or rough terrain may not directly cause the OBDII code B2586, they can contribute to wear and tear on the high beam system components, leading to potential malfunctions over time.

9. Should I reset the OBDII code B2586 in my Mercury after repairing the inoperative high beams?

After addressing the underlying issue causing the inoperative high beams, it is recommended to clear the OBDII code using a diagnostic tool to ensure the system recognizes the repair and resets any related warning lights.

10. Is it necessary to take my Mercury to a dealership for repairs related to OBDII code B2586 and inoperative high beams?

While a dealership may have specialized knowledge of Mercury vehicles, independent mechanics or automotive repair shops with experience in electrical systems can also diagnose and repair issues related to OBDII code B2586 effectively.