B1447 – Wiper Park Sense Circuit Open

The ODBII code B1447 indicates a malfunction in the Wiper Park Sense Circuit, specifically that the circuit is open, meaning there is a break in the electrical connection that affects the wiper park function.

The severity of ODBII code B1447 is generally considered moderate.

Common Causes For: B1446 Wiper Park Sense Circuit Failure

• Faulty wiper park switch
• Damaged wiring or connectors
• Corroded terminals
• Malfunctioning wiper motor
• Failed body control module (BCM)
• Poor ground connection

Common misdiagnosis for B1447 Wiper Park Sense Circuit Open

• Faulty windshield wiper motor
• Bad wiper switch
• Damaged wiring or connectors
• Malfunctioning body control module (BCM)
• Incorrectly installed wiper assembly
• Faulty rain sensor (if equipped)
• Issues with the vehicle’s electrical system

Common Troubleshooting Steps

The OBD-II code B1447 indicates a problem with the Wiper Park Sense Circuit, specifically that there is an open circuit. This can affect the operation of the windshield wipers, particularly their ability to park correctly when turned off. Here are some common troubleshooting steps to diagnose and potentially resolve the issue:

• Check the Vehicle’s Manual: Refer to the vehicle’s service manual for specific information about the wiper park sense circuit and wiring diagrams.
• Visual Inspection:
• Inspect the wiper motor and its connectors for any signs of damage, corrosion, or loose connections.
• Check the wiring harness for any frayed wires, breaks, or shorts that could cause an open circuit.
• Test the Wiper Motor:
• Use a multimeter to check the resistance of the wiper motor. If the motor is faulty, it may need to be replaced.
• Ensure that the wiper motor is receiving power when the wipers are activated.
• Check the Wiper Switch:
• Test the wiper switch for proper operation. A malfunctioning switch can cause issues with the wiper park sense circuit.
• Inspect the wiring and connectors associated with the wiper switch.
• Inspect the Ground Connections:
• Ensure that all ground connections related to the wiper system are clean, tight, and free of corrosion. A poor ground can lead to circuit issues.
• Scan for Additional Codes:
• Use an OBD-II scanner to check for any other related trouble codes that may provide more context to the issue.
• Check the Body Control Module (BCM):
• The BCM may control the wiper park function. If other components are functioning correctly, the BCM may need to be tested or reprogrammed.
• Perform a Continuity Test:
• With the vehicle off, perform a continuity test on the wiper park sense circuit to ensure there are no breaks in the wiring.
• Clear the Code and Test Drive:
• After performing repairs or adjustments, clear the code using an OBD-II scanner and take the vehicle for a test drive to see if the code returns.
• Consult a Professional:
• If the issue persists after performing these steps, it may be best to consult a professional mechanic or technician who has experience with your specific vehicle make and model. By following these steps, you should be able to identify and resolve the issue related to the B1447 code.