B1754 – Hazard Flash Output Circuit Open

The ODBII code B1754 indicates that there is an open circuit in the hazard flash output circuit, which means the system is not receiving the expected signal from the hazard lights.

The severity of ODBII code B1754 is moderate.

Common Causes For: B1753 Hazard Flash Output Circuit Failure

• Open circuit in the hazard flash output wiring
• Faulty hazard switch
• Defective body control module (BCM)
• Poor ground connection
• Corroded or damaged connectors
• Short circuit in the wiring harness
• Faulty relay associated with the hazard lights

Common misdiagnosis for B1754 Hazard Flash Output Circuit Open

• Faulty Body Control Module (BCM)
• Defective Turn Signal Switch
• Wiring Issues or Shorts
• Malfunctioning Hazard Switch
• Poor Ground Connections
• Faulty Relay
• Incorrectly Diagnosed Lighting Issues

Common Troubleshooting Steps

The OBD-II code B1754 refers to a problem with the Hazard Flash Output Circuit, indicating that there is an open circuit in the system. Here are some common troubleshooting steps to diagnose and resolve this issue:

• Check the Vehicle’s Manual: Refer to the vehicle’s service manual for specific information related to the B1754 code, including wiring diagrams and component locations.
• Visual Inspection:
• Inspect the wiring and connectors associated with the hazard flash output circuit for any signs of damage, corrosion, or loose connections.
• Look for frayed wires, broken connectors, or any other physical damage.
• Check the Hazard Switch:
• Test the hazard switch for proper operation. A faulty switch can cause an open circuit.
• If possible, use a multimeter to check for continuity when the switch is activated.
• Inspect Fuses:
• Check the fuses related to the hazard lights and the body control module (BCM). Replace any blown fuses.
• Test the Hazard Light Circuit:
• Use a multimeter to check for voltage at the hazard light circuit. Ensure that power is reaching the circuit when the hazard lights are activated.
• If there is no voltage, trace the circuit back to find where the open circuit may be.
• Check the Body Control Module (BCM):
• The BCM controls the hazard lights. If all other components are functioning correctly, the BCM may be faulty.
• If you have access to a scan tool, check for any additional codes that may indicate a problem with the BCM.
• Perform a Continuity Test:
• With the vehicle off, perform a continuity test on the wiring harness associated with the hazard flash output circuit. Look for any breaks in the wire.
• Inspect Ground Connections:
• Ensure that all ground connections related to the hazard light circuit are secure and free of corrosion.
• Clear the Code:
• After performing repairs, clear the code using an OBD-II scanner and take the vehicle for a test drive to see if the code returns.
• Seek Professional Help:
• If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or technician for further diagnosis. By following these steps, you should be able to identify and resolve the issue related to the B1754 code.