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B3875 2018 Chevrolet Silverado Code - Windshield Wiper High Speed Relay Circuit

Quick Answer

The B3875 diagnostic trouble code (DTC) on a 2018 Chevrolet Silverado indicates a problem with the windshield wiper high-speed relay circuit. Common causes include Faulty high-speed relay, Damaged wiring or connectors in the circuit, PCM malfunction. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
B3875 2018 Chevrolet Silverado indicates Windshield Wiper High Speed Relay Circuit.
Common causes
Common causes include Faulty high-speed relay, Damaged wiring or connectors in the circuit, PCM malfunction.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code B3875 2018 Chevrolet Silverado Description

The B3875 diagnostic trouble code (DTC) on a 2018 Chevrolet Silverado indicates a problem with the windshield wiper high-speed relay circuit. This code is specifically related to the high-speed setting of the windshield wipers and can affect the vehicle's ability to clear the windshield effectively in adverse weather conditions.

OBDII Code B3875 2018 Chevrolet Silverado - Windshield Wiper High Speed Relay Circuit
B3875 2018 Chevrolet Silverado Code - Windshield Wiper High Speed Relay Circuit

Common Causes of B3875 2018 Chevrolet Silverado

  1. Faulty high-speed relay.
  2. Damaged wiring or connectors in the circuit.
  3. PCM malfunction.
  4. Water damage to the wiper system.
  5. Corrosion or rust affecting the electrical connections.

Symptoms of B3875 2018 Chevrolet Silverado

  1. Windshield wipers not operating at high speed.
  2. Intermittent operation of the high-speed setting.
  3. Wipers getting stuck or pausing during high-speed operation.
  4. Wipers only working on lower speed settings.
  5. Check engine light illuminated on the dashboard.

How to Fix B3875 2018 Chevrolet Silverado

  1. Begin by conducting a visual inspection of the wiper system, looking for any obvious signs of damage or corrosion.
  2. Use a multimeter to test the high-speed relay and ensure it is functioning correctly. Replace if necessary.
  3. Check the wiring and connectors in the circuit for any breaks or loose connections. Repair or replace as needed.
  4. If the issue persists, consult the vehicle's service manual for specific diagnostic steps related to the PCM and follow them accordingly.
  5. Clear the DTC from the PCM using a diagnostic scanner after completing the repairs and test the wipers to confirm proper operation.

Cost to Fix B3875 2018 Chevrolet Silverado

The cost of repairing the windshield wiper high-speed relay circuit on a 2018 Chevrolet Silverado can vary depending on the extent of the issue and the cost of parts and labor. Typically, the cost of parts for this repair can range from $50 to $200, while labor costs can range from $100 to $300. In total, the repair could cost anywhere from $150 to $500. It's important to note that these are rough estimates, and actual costs may vary based on the specific circumstances of the repair and the rates charged by auto repair shops. It is recommended to obtain quotes from multiple shops to ensure a competitive price.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B3875 2018 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code B3875 in a 2018 Chevrolet Silverado related to the Windshield Wiper High Speed Relay Circuit?

- Common symptoms include the windshield wipers operating only at one speed or not working at all.

2. What are the possible causes of OBDII code B3875 in a 2018 Chevrolet Silverado?

- Possible causes may include a faulty high-speed relay, damaged wiring in the circuit, or a malfunctioning wiper motor.

3. How can I diagnose the Windshield Wiper High Speed Relay Circuit issue in my 2018 Chevrolet Silverado?

- You can use a multimeter to test the relay for continuity, inspect the wiring for any visible damage, and check the wiper motor for proper functioning.

4. Is it safe to continue driving my 2018 Chevrolet Silverado with OBDII code B3875 related to the Windshield Wiper High Speed Relay Circuit?

- It is not recommended to drive in heavy rain or adverse weather conditions as the windshield wipers may not function properly, affecting visibility.

5. Can I repair the Windshield Wiper High Speed Relay Circuit issue in my 2018 Chevrolet Silverado myself?

- Depending on your automotive knowledge and experience, you may be able to replace the faulty relay or repair damaged wiring yourself. However, it is recommended to consult a professional if unsure.

6. Are there any temporary fixes I can try for OBDII code B3875 in my 2018 Chevrolet Silverado until I can get it repaired?

- You can try tapping the relay gently to see if it activates temporarily, but this is not a long-term solution. It's best to address the root cause of the issue promptly.

7. How much does it typically cost to repair the Windshield Wiper High Speed Relay Circuit problem in a 2018 Chevrolet Silverado?

- The cost of repair can vary depending on the extent of the issue, parts needed, and labor. It's advisable to get a quote from a trusted mechanic or dealership.

8. Can extreme weather conditions or water exposure cause OBDII code B3875 in a 2018 Chevrolet Silverado?

- Yes, prolonged exposure to water or harsh weather conditions can lead to corrosion or damage in the windshield wiper circuit, triggering the OBDII code.

9. Will resetting the OBDII system clear the B3875 code related to the Windshield Wiper High Speed Relay Circuit in a 2018 Chevrolet Silverado?

- Resetting the system may temporarily remove the code, but if the underlying issue is not fixed, the code is likely to reappear after driving.

10. How long does it take to repair the Windshield Wiper High Speed Relay Circuit issue in a 2018 Chevrolet Silverado?

- The repair time can vary depending on the complexity of the problem and availability of parts. It's best to inquire with the technician performing the repair for an estimate.

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