B1829 – Wiper Rear High Limit Input Circuit Short To Ground

The ODBII code B1829 indicates a malfunction in the rear wiper system, specifically that the high limit input circuit is shorted to ground, which may prevent the rear wiper from functioning properly.

The severity of ODBII code B1829 is moderate.

Common Causes For: B1828 Wiper Rear High Limit Input Circuit Short To Battery

• Shorted wiring or connectors in the rear wiper circuit.
• Faulty rear wiper motor.
• Damaged or corroded ground connections.
• Malfunctioning wiper switch.
• Issues with the body control module (BCM).
• Water intrusion or moisture in electrical connections.

Common misdiagnosis for B1829 Wiper Rear High Limit Input Circuit Short To Ground

• Faulty rear wiper motor
• Damaged wiring or connectors
• Malfunctioning body control module (BCM)
• Incorrectly installed or defective rear wiper switch
• Shorted or damaged ground connections
• Issues with the main wiring harness
• Faulty relay or fuse related to the rear wiper system

Common Troubleshooting Steps

The OBD-II code B1829 refers to a problem with the rear wiper’s high limit input circuit, indicating a short to ground. 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 about the rear wiper system and wiring diagrams.
• Visual Inspection:
• Inspect the wiring harness and connectors related to the rear wiper motor and the high limit switch. Look for any signs of damage, fraying, or corrosion.
• Check for any loose or disconnected wires that could cause a short circuit.
• Test the Rear Wiper Motor:
• Disconnect the rear wiper motor and check for continuity in the wiring harness. Use a multimeter to test for shorts to ground in the circuit.
• If the motor is shorted, it may need to be replaced.
• Check the High Limit Switch:
• The high limit switch may be malfunctioning. Test the switch for proper operation using a multimeter. If it is stuck or not functioning correctly, it may need to be replaced.
• Inspect Ground Connections:
• Ensure that all ground connections related to the rear wiper system are clean and secure. A poor ground can cause erratic behavior and trigger fault codes.
• Check for Other Fault Codes:
• Use an OBD-II scanner to check for any additional codes that may provide more context or indicate related issues.
• Clear the Code:
• After performing any 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 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 B1829 code.