AutoCodes – Ford – B1507 Ford

B1507 Ford 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 Ford 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 1,025

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

What does this mean?

What are the Possible Causes of the DTC B1507 Ford?

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 Ford?

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 Ford 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 Ford Code

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

- The common symptoms include the flash-to-pass feature not working, the high beams not engaging, and the indicator light on the dashboard staying illuminated.

2. What are the possible causes of the B1507 Ford trouble code?

- The code B1507 is typically triggered by a malfunction in the flash-to-pass switch circuit, which can be caused by a faulty switch, damaged wiring, or a defective control module.

3. How can I diagnose the Flash To Pass Switch Circuit Failure issue?

- To diagnose the issue, you can start by visually inspecting the flash-to-pass switch and its wiring for any visible damage. Using a digital multimeter to test the continuity of the circuit can also help pinpoint the problem.

4. Can I repair the Flash To Pass Switch Circuit Failure issue myself?

- If you have experience working with automotive electrical systems, you may be able to repair the issue yourself by replacing the faulty flash-to-pass switch or repairing the damaged wiring. However, if you're not familiar with electrical work, it's recommended to seek professional help.

5. Is it safe to drive with the B1507 Ford trouble code?

- While the code B1507 itself may not affect the drivability of the vehicle, it's important to address the underlying issue promptly to ensure the proper functioning of the flash-to-pass feature, which is crucial for safe driving, especially at night.

6. Can resetting the trouble code fix the Flash To Pass Switch Circuit Failure problem?

- Resetting the trouble code may temporarily turn off the indicator light on the dashboard, but it will not fix the underlying issue causing the Flash To Pass Switch Circuit Failure. It's important to diagnose and repair the problem to prevent the code from reoccurring.

7. How much does it typically cost to repair the B1507 Ford trouble code?

- The cost of repairing the Flash To Pass Switch Circuit Failure can vary depending on the specific cause of the issue and whether you choose to do the repair yourself or take your vehicle to a professional. Costs may include parts and labor.

8. Are there any common related issues that may trigger the B1507 Ford trouble code?

- Other related issues that may trigger the B1507 code include problems with the high beam headlights, malfunctioning turn signal switches, or issues with the vehicle's lighting control module.

9. Will the B1507 Ford trouble code cause my vehicle to fail an emissions test?

- The B1507 code is related to the flash-to-pass switch circuit and is not directly related to emissions control. However, it's important to ensure all aspects of your vehicle are in proper working condition to pass an emissions test.

10. How can I prevent the Flash To Pass Switch Circuit Failure issue in the future?

- To prevent the B1507 trouble code from recurring, it's essential to regularly inspect and maintain the flash-to-pass switch, wiring, and related components. Addressing any issues promptly can help prevent future failures.