B1567 — Lamp Headlamp High-Beam Circuit Failure #

Note: The code label may vary depending on the vehicle manufacturer. Always refer to OEM documentation for the most accurate code description.

• B1567 – Headlamp High Beam Circuit Malfunction (Toyota, Lexus)
• B1567 – High Beam Headlamp Relay Circuit Failure (Ford, Lincoln, Mercury)
• B1567 – Headlight High Beam Control Circuit Error (Honda, Acura)
• B1567 – High-beam Headlamp Circuit Fault (Mazda)

Summary of code B1567 #

B1567 is a diagnostic trouble code (DTC) that points to an electrical fault within the high-beam headlamp circuit. This code is triggered when the vehicle’s body control module (BCM) or lighting control module detects abnormal voltage, open circuits, or shorts affecting the high-beam function. In plain terms, this means your car has trouble controlling or supplying power to the high-beam headlights. The code’s presence usually results in high-beams that don’t work as intended—either failing to activate, remaining stuck on, or behaving erratically. This kind of issue may compromise nighttime driving safety and should be investigated promptly, even if the vehicle is otherwise drivable.

Frequent symptoms for code B1567 #

When a B1567 code is stored, you’ll often notice issues with your vehicle’s high-beam headlights. The high-beams may be unreliable, stuck on, or completely non-functional, depending on the nature of the fault. Sometimes, you might see a warning light or message on your instrument panel. Other symptoms could be subtler, such as flickering or intermittent operation when you try to engage the high-beams.

• High-beam headlights won’t turn on
• High-beams stuck on and won’t switch off
• Intermittent or flickering high-beam function
• Dashboard warning lamp illuminated (e.g., headlamp or lighting system warning)
• Headlamp relay clicking or buzzing sounds

Probable causes for code B1567 #

The most common causes of a B1567 code relate to electrical faults within the headlamp high-beam circuit. These can range from something as simple as a blown fuse to more complex issues like damaged wiring or a failed control module. In many cases, environmental factors (like moisture) or recent repairs can contribute to these problems.

1. Faulty high-beam bulb (burned out or internally shorted)
2. Defective high-beam relay (sticking or failed contacts)
3. Open or shorted wiring (corrosion, rodent damage, or abrasion in the harness)
4. Bad ground connection (loose or corroded ground terminal)
5. Failed body control module (BCM) or lighting control module (less common, but possible)
6. Blown fuse (protecting the high-beam circuit)
7. Faulty high-beam switch or stalk (wear or internal failure)

Step-by-step diagnostic for code B1567 #

Diagnosing a B1567 code involves a systematic approach to uncover the source of the high-beam circuit failure. It’s important to use a digital multimeter, a test light, and—if available—OEM wiring diagrams for your specific vehicle. Remember, safety comes first: always disconnect the battery before handling any wiring, and ensure the ignition is off during inspections.

• 1. Verify the code: Use a scan tool to confirm B1567 is present and note any related trouble codes (especially those linked to lighting or electrical systems).
• 2. Visual inspection: Examine the high-beam bulbs, connectors, and wiring for obvious signs of damage, corrosion, or loose connections.
• 3. Check the high-beam bulbs: Test both bulbs for continuity. Replace any bulb that is burned out, looks cloudy, or shows filament damage.
• 4. Inspect the fuse: Locate and inspect the fuse protecting the high-beam circuit. Replace if blown, but investigate the root cause if it blows again.
• 5. Test the relay: Swap the high-beam relay with a similar, known-good relay (if available). Listen for relay operation when activating high-beams.
• 6. Check the switch: Test the high-beam switch or stalk for continuity and smooth operation.
• 7. Examine wiring and grounds: Use a multimeter to check for open circuits, shorts to ground, or voltage drop in the wiring. Ensure ground connections are clean and tight.
• 8. Scan for module faults: If all hardware checks out, use your scan tool to examine BCM or lighting module data for anomalies.
• 9. Seek OEM guidance: If no faults are found, consult OEM service information for advanced diagnostics and possible module reprogramming or replacement.

Possible repairs for code B1567 #

Repairs for the B1567 code are always dictated by the root cause identified during diagnosis. Addressing the actual fault—not just clearing the code—is essential for a lasting repair. In most cases, repairs are straightforward, but some may require specialized parts or dealer-level reprogramming.

• Replace burned-out or faulty high-beam bulb(s)
• Replace or repair damaged wiring/connectors in the high-beam circuit
• Replace a defective high-beam relay
• Clean, tighten, or repair ground connections
• Replace blown fuse and address underlying causes
• Replace a faulty high-beam switch or stalk
• Repair or replace the BCM or lighting control module (rare; only after all other causes are ruled out)
• Update or reprogram the BCM/lighting module as per OEM bulletin

Is it safe to drive with code B1567? #

Driving with code B1567 is possible but not recommended, especially at night or in poor visibility conditions. While the car may appear otherwise normal, high-beam headlamps are essential for safe nighttime driving and for signaling other drivers. If the high-beams are stuck on, you may risk dazzling other motorists; if they’re inoperative, your own visibility is compromised. It’s best to repair the issue before driving after dark or in adverse weather.

Vehicles most commonly affected by code B1567 #

B1567 is a generic body code, but it tends to appear more often on vehicles from certain manufacturers that use similar lighting control architectures. While it can technically occur on any modern vehicle, these are some of the more frequently affected brands and models:

• Toyota Camry, Corolla, Highlander (various years)
• Ford F-150, Escape, Fusion (various years)
• Lexus RX, ES, IS
• Honda Accord, Civic, CR-V
• Mazda 3, Mazda 6, CX-5
• Lincoln MKZ, Navigator

Common mistakes & best practices with B1567 #

When troubleshooting B1567, it’s easy to overlook the basics or replace parts without a proper diagnosis. Rushing can lead to unnecessary costs and unresolved issues. Taking a methodical approach and always verifying the repair is crucial for success.

• Assuming the bulb is the only issue—always check the entire circuit first
• Overlooking a simple blown fuse or corroded ground terminal
• Replacing the relay without testing it
• Neglecting to inspect connectors for moisture or corrosion
• Not clearing the code and confirming the repair before closing the job
• Forgetting to check OEM technical service bulletins (TSBs) for known issues or software updates

Quick FAQ for B1567 #

If you’re facing a B1567 code, you probably have questions. Here are quick answers to some of the most common ones.

• Q: Will clearing the code make my high-beams work again?
  A: No. Clearing the code may turn off the warning light briefly, but unless the underlying problem is fixed, the code—and the high-beam issue—will return.
• Q: Can a dead battery or jump start cause B1567?
  A: Rarely. While low voltage can sometimes trigger odd electrical codes, B1567 almost always indicates a direct circuit fault. If the code appeared after a jump start, inspect for blown fuses or damaged wiring.