AutoCodes – Mercury – B1507 Mercury

B1507 Mercury Code - Flash To Pass Switch Circuit Failure

Quick Answer

The Smart Junction Box (SJB) sends reference signals to the headlamp switch through circuits. Common causes include Faulty Headlamp Switch, Headlamp Switch harness is open or shorted, Headlamp Switch 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: B1507 Mercury indicates Flash To Pass Switch Circuit Failure.
Common causes: Common causes include Faulty Headlamp Switch, Headlamp Switch harness is open or shorted, Headlamp Switch 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 846

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 Apr 29, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1507 Mercury Description

The Smart Junction Box (SJB) sends reference signals to the headlamp switch through circuits. When the headlamp switch is placed in the HEADLAMPS ON position, the voltage signal is routed to ground through the circuit. If the SJB detects a fault with the headlamp switch inputs, the SJB turns the exterior lamps on by default. When the SJB detects the headlamp switch in the HEADLAMPS ON position and the multifunction switch in the LOW BEAM position, the SJB sends voltage through circuits to the low beam headlamps. When the SJB detects the headlamp switch in the HEADLAMPS ON position and the multifunction switch in the HIGH BEAM position, the SJB sends voltage through circuits to the high beam headlamps. The SJB sends a reference signal to the multifunction switch through circuits CLF27 (GN/BN) and CLF17 (WH/OG). When the multifunction switch is placed in the FLASH-TO-PASS or HIGH BEAM position, the voltage signal is routed to ground. When the SJB detects a request for the flash-to-pass, the SJB sends voltage to the high beam headlamps. The OBDII codes when the SJB detects a short to ground from the flash-to-pass input circuit.

OBDII Code B1507 Mercury - Flash To Pass Switch Circuit Failure - AutoCodes.com — B1507 Mercury Code - Flash To Pass Switch Circuit Failure

What does this mean?

What are the Possible Causes of the DTC B1507 Mercury?

Faulty Headlamp Switch
Headlamp Switch harness is open or shorted
Headlamp Switch circuit poor electrical connection
Faulty Smart Junction Box (SJB)

How to Fix the DTC B1507 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 B1507 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 B1507 Mercury Code

1. What are the common symptoms of OBDII code B1507 Mercury (Flash To Pass Switch Circuit Failure)?

The common symptoms include the inability to activate the flash-to-pass feature, malfunctioning high beams, and the illumination of the check engine light.

2. What are the possible causes of the B1507 OBDII code in a Mercury vehicle?

Possible causes include a faulty flash-to-pass switch, damaged wiring or connectors in the circuit, a blown fuse, or a malfunctioning control module.

3. How can I diagnose the Flash To Pass Switch Circuit Failure in my Mercury vehicle?

Diagnosing the issue involves checking the flash-to-pass switch for proper operation, inspecting the wiring and connectors for any damage, testing the fuse related to the circuit, and using an OBDII scanner to retrieve the specific error code.

4. Can I continue to drive my Mercury if the B1507 code is present?

While the vehicle may still be operable with the B1507 code, it is recommended to address the issue promptly to ensure proper functioning of the flash-to-pass feature and high beams.

5. Are there any simple repairs I can try to fix the Flash To Pass Switch Circuit Failure in my Mercury?

You can start by checking and replacing any blown fuses related to the circuit, inspecting and repairing any damaged wiring or connectors, and testing the flash-to-pass switch for proper functionality.

6. Is it necessary to visit a mechanic for the repair of the B1507 OBDII code in my Mercury?

Depending on your level of automotive repair experience and access to tools, you may be able to address the issue yourself. However, if you are unsure or not confident in your abilities, it is recommended to seek professional help.

7. Can a faulty flash-to-pass switch be repaired, or does it need to be replaced?

In most cases, a faulty flash-to-pass switch will need to be replaced to resolve the B1507 code. Repairing the switch is not common due to the complexity of the internal components.

8. Will resetting the OBDII system clear the B1507 code from my Mercury?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing the Flash To Pass Switch Circuit Failure is not addressed, the code is likely to reappear.

9. How much can I expect to pay for the repair of the B1507 code in a Mercury vehicle?

The cost of repair can vary depending on the specific cause of the issue, labor rates in your area, and whether any parts need to be replaced. It is recommended to obtain quotes from different mechanics for an accurate estimate.

10. Is the Flash To Pass Switch Circuit Failure a common issue in Mercury vehicles?

While not as common as some other OBDII codes, the B1507 code can occur in Mercury vehicles, particularly in models equipped with a flash-to-pass feature. Regular maintenance and prompt repairs can help prevent such issues.