B1448 – Wiper Park Sense Circuit Short To Battery

The ODBII code B1448 indicates a malfunction in the wiper park sense circuit, specifically a short circuit to the battery, which can prevent the windshield wipers from properly parking in their designated position.

The severity of ODBII code B1448 is moderate.

Common Causes For: B1447 Wiper Park Sense Circuit Open

• Shorted wiring or connectors
• Faulty wiper park sense switch
• Malfunctioning wiper motor
• Corroded or damaged electrical connections
• Faulty body control module (BCM)

Common misdiagnosis for B1448 Wiper Park Sense Circuit Short To Battery

• Wiper motor failure
• Wiper switch malfunction
• Wiring harness issues
• Faulty body control module (BCM)
• Grounding problems
• Shorted wiring connections
• Incorrectly installed wiper assembly
• Blown fuses
• Corroded connectors
• Faulty rain sensor (if equipped)

Common Troubleshooting Steps

The OBD-II code B1448 indicates a problem with the Wiper Park Sense Circuit, specifically a short to battery. This code is often associated with issues in the wiper system, particularly the park function. Here are some common troubleshooting steps to diagnose and resolve the issue:

• Visual Inspection:
• Check the wiring and connectors related to the wiper motor and the park sense circuit. Look for any signs of damage, fraying, or corrosion.
• Inspect the wiper motor itself for any physical damage or signs of wear.
• Check Fuses:
• Locate the fuse box and check for any blown fuses related to the wiper system. Replace any blown fuses and see if the code persists.
• Test the Wiper Motor:
• Use a multimeter to test the wiper motor for proper voltage and ground. Ensure that the motor is receiving the correct voltage when the wipers are activated.
• If the motor is not functioning correctly, it may need to be replaced.
• Inspect the Park Switch:
• The park switch is responsible for ensuring that the wipers return to the park position. Test the park switch for continuity and proper operation.
• If the switch is faulty, it may need to be replaced.
• Check for Shorts:
• Use a multimeter to check for shorts in the wiring harness. Look for any wires that may be pinched, frayed, or touching the chassis, which could cause a short to battery.
• Scan for Additional Codes:
• Use an OBD-II scanner to check for any additional trouble codes that may provide more context to the issue. Address any other codes that may be present.
• Clear the Code:
• After performing the above checks and repairs, clear the code using an OBD-II scanner. Take the vehicle for a test drive to see if the code reappears.
• Consult Wiring Diagrams:
• If the issue persists, consult the vehicle’s wiring diagrams to trace the circuit and identify any other components that may be involved in the wiper park sense circuit.
• Professional Diagnosis:
• If you are unable to resolve the issue after these steps, consider seeking help from a professional mechanic or technician who has experience with your specific vehicle make and model. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the B1448 code.