B1755 – Hazard Flash Output Circuit Short Battery

The ODBII code B1755 indicates a short circuit in the hazard flash output circuit, which is causing it to be continuously powered by the battery.

The severity of ODBII code B1755 is moderate.

Common Causes For: B1754 Hazard Flash Output Circuit Open

• Shorted wiring or connectors in the hazard flash output circuit.
• Faulty hazard switch.
• Malfunctioning body control module (BCM).
• Corroded or damaged connectors.
• Grounding issues in the circuit.
• Faulty relay associated with the hazard lights.

Common misdiagnosis for B1755 Hazard Flash Output Circuit Short Battery

• Faulty Body Control Module (BCM)
• Shorted wiring or connectors
• Defective turn signal switch
• Malfunctioning hazard switch
• Grounding issues
• Battery or charging system problems
• Incorrectly installed aftermarket accessories

Common Troubleshooting Steps

When dealing with an OBD-II code B1755, which indicates a “Hazard Flash Output Circuit Short to Battery,” there are several common troubleshooting steps you can follow to diagnose and potentially resolve the issue. Here’s a structured approach:

• Verify the Code: Use an OBD-II scanner to confirm the presence of the B1755 code.
• Check for any additional codes that may provide more context or related issues.
• Inspect the Wiring and Connectors: **Visual Inspection: Check the wiring harness and connectors related to the hazard flash output circuit for any signs of damage, corrosion, or loose connections.
• **Continuity Test: Use a multimeter to check for continuity in the wiring. Look for any shorts to ground or battery voltage.
• Check the Hazard Switch: Inspect the hazard switch for proper operation. A malfunctioning switch can cause a short circuit.
• If possible, test the switch with a multimeter to ensure it is functioning correctly.
• Examine the Body Control Module (BCM): The BCM often controls the hazard lights. Check for any faults or issues with the BCM.
• If you have access to a scan tool, check for BCM-related codes or data that may indicate a problem.
• Inspect Related Components: Check other components that may be connected to the hazard flash output circuit, such as relays or fuses.
• Ensure that the fuses related to the hazard lights are intact and functioning.
• Perform a Visual Inspection of the Circuit: Look for any signs of wear, fraying, or damage in the circuit that could lead to a short.
• Pay special attention to areas where the wiring may be exposed to heat or abrasion.
• Test the Hazard Light Functionality: Manually activate the hazard lights and observe their operation. Check if they flash correctly and if the dashboard indicators respond appropriately.
• Check for Ground Issues: Ensure that the ground connections for the hazard circuit are secure and free of corrosion.
• A poor ground can lead to erratic behavior and may trigger the B1755 code.
• Clear the Code and Test Drive: After performing the above checks and repairs, clear the code using the OBD-II scanner.
• Take the vehicle for a test drive to see if the code returns.
• Consult Repair Manuals or Technical Service Bulletins (TSBs): If the issue persists, consult the vehicle’s repair manual or look for any TSBs related to the B1755 code for specific guidance related to your vehicle make and model.1
• Seek Professional Help: If you are unable to resolve the issue after following these steps, it may be best to consult a professional mechanic or technician who has experience with your specific vehicle. By following these troubleshooting steps, you should be able to identify and address the cause of the B1755 code effectively.