B1465 – Wiper Brake/Run Relay Circuit Open

The ODBII code B1465 indicates that there is an open circuit in the Wiper Brake/Run relay, which means the relay is not functioning properly or is not receiving power.

The severity of ODBII code B1465 is moderate.

Common Causes For: B1464 Seat Belt Switch Circuit Short To Battery

• Faulty wiper brake/run relay
• Open or damaged wiring in the relay circuit
• Poor connections or corroded terminals
• Faulty wiper control module
• Blown fuse related to the wiper system
• Malfunctioning body control module (BCM)

Common misdiagnosis for B1465 Wiper Brake/Run Relay Circuit Open

• Faulty wiper motor
• Bad wiper switch
• Damaged wiring or connectors
• Faulty body control module (BCM)
• Incorrectly installed or malfunctioning relay
• Battery or charging system issues
• Grounding problems

Common Troubleshooting Steps

The OBD-II code B1465 indicates a problem with the Wiper Brake/Run Relay Circuit, specifically that there is an open circuit. Here are some common troubleshooting steps to diagnose and potentially resolve this issue:

• Check the Vehicle’s Manual: Refer to the vehicle’s service manual for specific information about the wiper brake/run relay circuit, including wiring diagrams and component locations.
• Visual Inspection:
• Inspect the wiring and connectors associated with the wiper brake/run relay circuit for any signs of damage, corrosion, or loose connections.
• Look for frayed wires, broken connectors, or any other physical damage.
• Test the Relay:
• Locate the wiper brake/run relay in the fuse box or relay panel.
• Remove the relay and test it using a multimeter to check for continuity. If the relay is faulty, replace it.
• Check Fuses:
• Inspect the fuses related to the wiper system and the brake/run relay circuit. Replace any blown fuses.
• Inspect Ground Connections:
• Ensure that all ground connections related to the wiper system and relay are secure and free of corrosion. A poor ground can cause circuit issues.
• Use a Multimeter:
• With the ignition on, use a multimeter to check for voltage at the relay terminals. If there is no voltage, trace the wiring back to find the source of the open circuit.
• Check for continuity in the wiring between the relay and the components it connects to.
• Check for Short Circuits:
• Inspect the circuit for any short circuits that may be causing the relay to not function properly.
• Scan for Additional Codes:
• Use an OBD-II scanner to check for any additional trouble codes that may provide more context or indicate related issues.
• Consult Technical Service Bulletins (TSBs):
• Look for any TSBs related to the wiper system or the specific code. Manufacturers may have issued guidance for known issues.
• Professional Diagnosis:
• If the issue persists after performing these steps, consider seeking help from a professional mechanic or technician who has experience with your vehicle make and model. By following these steps, you should be able to identify the cause of the B1465 code and take appropriate action to resolve the issue.