B1828: Wiper Rear High Limit Input Circuit Short To Battery

Definition

The OBD2 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

Common causes

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 misdiagnoses

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

Troubleshooting steps

1.Visual Inspection
2.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
3.Inspect the rear wiper motor for any physical damage or signs of water intrusion
4.Check for Short Circuits
5.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
6.Inspect the wiring for any areas that may be pinched or rubbing against metal surfaces, which could cause a short
7.Test the Rear Wiper Motor
8.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
9.Inspect the High Limit Switch
10.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
11.Check the Body Control Module (BCM)
12.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
13.Scan for Additional Codes
14.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
15.Clear Codes and Test Drive
16.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
17.If the issue persists, consult the vehicle’s service manual for specific wiring diagrams and troubleshooting procedures related to the rear wiper system
18.Professional Diagnosis
19.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

Definition

Common causes

Common misdiagnoses

Troubleshooting steps

1.Visual Inspection

2.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

3.Inspect the rear wiper motor for any physical damage or signs of water intrusion

4.Check for Short Circuits

5.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

6.Inspect the wiring for any areas that may be pinched or rubbing against metal surfaces, which could cause a short

7.Test the Rear Wiper Motor

8.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

9.Inspect the High Limit Switch

10.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

11.Check the Body Control Module (BCM)

12.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

13.Scan for Additional Codes

14.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

15.Clear Codes and Test Drive

16.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

17.If the issue persists, consult the vehicle’s service manual for specific wiring diagrams and troubleshooting procedures related to the rear wiper system

18.Professional Diagnosis

19.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