AutoCodes – Chevrolet – B3875 2018 Chevrolet Silverado

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

Quick Answer

The windshield wiper motor is controlled by the Body Control Module (BCM) through the windshield wiper replay and the windshield wiper speed control relay. Common causes include Faulty Windshield Wiper Relay, Windshield Wiper Relay harness is open or shorted, Windshield Wiper Relay circuit poor electrical connection. 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 Windshield Wiper Relay, Windshield Wiper Relay harness is open or shorted, Windshield Wiper Relay circuit poor electrical connection.
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.

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Code Popularity 365

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3875 2018 Chevrolet Silverado Description

The windshield wiper motor is controlled by the Body Control Module (BCM) through the windshield wiper replay and the windshield wiper speed control relay. When low speed windshield wiper operation is requested, the BCM will apply voltage to the windshield wiper relay control circuit. This will cause the contacts in the windshield wiper relay to close and apply B+ to the windshield wiper motor through the windshield wiper low speed control circuit, enabling low speed wiper operation. When high speed windshield wiper operation is requested, the body control module continues to apply voltage to the windshield wiper relay control circuit and also applies ground to the windshield wiper speed control relay control circuit. This will cause the contacts in the windshield wiper speed control relay to close and apply B+ to the windshield wiper motor through the windshield wiper high speed control circuit, enabling high speed wiper operation. When the windshield wiper request is no longer present, the contacts in the windshield wiper relay and windshield wiper speed control relay will open, removing B+ from the wiper motor control circuits. The windshield wiper motor will continue to operate using a discrete B+ circuit provided by the BCM until the wipers are in the park position.

OBDII Code B3875 2018 Chevrolet Silverado - Windshield Wiper High Speed Relay Circuit - AutoCodes.com — B3875 2018 Chevrolet Silverado Code - Windshield Wiper High Speed Relay Circuit

What does this mean?

What are the Possible Causes of the DTC B3875 2018 Chevrolet Silverado?

Faulty Windshield Wiper Relay
Windshield Wiper Relay harness is open or shorted
Windshield Wiper Relay circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B3875 2018 Chevrolet Silverado?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B3875 2018 Chevrolet Silverado code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B3875 2018 Chevrolet Silverado code?

Need more information on how to fix the B3875 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B3875 2018 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

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.