B1828 – Wiper Rear High Limit Input Circuit Short To Battery

The ODBII code B1828 indicates a malfunction in the rear wiper system, specifically that the high limit input circuit is shorted to the battery, which may cause the rear wiper to operate improperly or continuously.

The severity of ODBII code B1828 is moderate.

Common Causes For: B1827 Wiper Rear High Limit Input Circuit Open

• Shorted wiring or connectors
• Faulty rear wiper motor
• Malfunctioning wiper switch
• Corroded or damaged electrical connections
• Faulty body control module (BCM)
• Ground circuit issues

Common misdiagnosis for B1828 Wiper Rear High Limit Input Circuit Short To Battery

• Faulty rear wiper motor
• Damaged wiring or connectors
• Malfunctioning wiper switch
• Defective body control module (BCM)
• Short circuit in the wiring harness
• Incorrectly installed or faulty relay

Common Troubleshooting Steps

The OBD-II code B1828 indicates a problem with the rear wiper high limit input circuit, specifically a short to battery. This code is often associated with issues in the rear wiper system of a vehicle. Here are some common troubleshooting steps to diagnose and resolve the issue:

• Visual Inspection:
• Check the wiring and connectors associated with the rear wiper motor and the high limit switch. Look for any signs of damage, fraying, or corrosion.
• Inspect the rear wiper motor for any physical damage or signs of water intrusion.
• Check for Short Circuits:
• Use a multimeter to check for continuity in the wiring harness. Disconnect the rear wiper motor and check the resistance between the wires to see if there is a short to battery.
• Inspect the wiring for any areas that may be pinched or rubbing against metal surfaces, which could cause a short.
• Test the Rear Wiper Motor:
• With the rear wiper motor disconnected, test the motor for proper operation by applying power directly to it. If the motor operates correctly, the issue may lie in the control circuit or wiring.
• Inspect the High Limit Switch:
• If applicable, check the high limit switch for proper operation. This switch is designed to prevent the wiper from moving beyond its intended range. Test the switch for continuity and ensure it is functioning correctly.
• Check the Body Control Module (BCM):
• The BCM controls various electrical functions in the vehicle, including the rear wiper. Check for any fault codes in the BCM and inspect its connections. If the BCM is faulty, it may need to be reprogrammed or replaced.
• Scan for Additional Codes:
• Use an OBD-II scanner to check for any additional trouble codes that may provide more context to the issue. Addressing related codes may help resolve the B1828 code.
• Clear Codes and Test Drive:
• After performing the above checks and repairs, clear the trouble codes using an OBD-II scanner. Take the vehicle for a test drive to see if the code reappears.
• Consult Service Manual:
• If the issue persists, consult the vehicle’s service manual for specific wiring diagrams and troubleshooting procedures related to the rear wiper system.
• Professional Diagnosis:
• If you are unable to resolve the issue, consider seeking help from a professional mechanic or automotive technician who has experience with electrical systems. By following these steps, you should be able to identify and resolve the issue related to the B1828 code.