AutoCodes – Chevrolet – B3875 Chevrolet

B3875 Chevrolet 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 Chevrolet 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 10,131

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

What does this mean?

What are the Possible Causes of the DTC B3875 Chevrolet?

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 Chevrolet?

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 Chevrolet 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 Chevrolet code?

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

Need Help with the Code?

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

Information for Specific Chevrolet Models

B3875 2014 Chevrolet Silverado — Windshield Wiper High Speed Relay Circuit
B3875 2015 Chevrolet Silverado — Windshield Wiper High Speed Relay Circuit
B3875 2016 Chevrolet Silverado — Windshield Wiper High Speed Relay Circuit
B3875 2017 Chevrolet Silverado — Windshield Wiper High Speed Relay Circuit
B3875 2018 Chevrolet Silverado — Windshield Wiper High Speed Relay Circuit

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 Chevrolet Code

1. What are the common symptoms of OBDII code B3875 Chevrolet (Windshield Wiper High Speed Relay Circuit)?

Symptoms include the windshield wipers operating only at one speed, typically the high speed setting, regardless of the selected mode.

2. What are the possible causes of OBDII code B3875 Chevrolet?

Common causes include a faulty windshield wiper relay, damaged wiring or connectors in the circuit, or a malfunctioning wiper motor.

3. How can I diagnose the issue related to OBDII code B3875 Chevrolet?

You can use a multimeter to test the continuity of the relay, inspect the wiring for any visible damage, and check for any loose connections in the circuit.

4. Can I still drive my vehicle with OBDII code B3875 Chevrolet?

It is generally safe to drive your vehicle with this code, but you may experience limited or no control over the windshield wiper speed, especially in inclement weather conditions.

5. How can I repair OBDII code B3875 Chevrolet?

Repair options include replacing the faulty windshield wiper relay, repairing any damaged wiring, or addressing any loose connections in the circuit.

6. Will resetting the OBDII code B3875 Chevrolet make the issue go away?

Resetting the code may temporarily clear the warning light, but it will not fix the underlying issue causing the malfunction in the windshield wiper high-speed relay circuit.

7. Can a DIY enthusiast fix OBDII code B3875 Chevrolet at home?

For those with experience in automotive repairs and access to the necessary tools, DIY repair of this code is possible, especially if the issue is related to the relay or wiring.

8. Is OBDII code B3875 specific to Chevrolet vehicles only?

Yes, this particular code, related to the windshield wiper high-speed relay circuit, is specific to Chevrolet vehicles.

9. How much does it cost to repair OBDII code B3875 Chevrolet at a professional auto repair shop?

Costs can vary depending on the exact cause of the issue, but repairs related to the windshield wiper high-speed relay circuit typically range from $100 to $300 at a professional auto repair shop.

10. Are there any preventive maintenance tips to avoid OBDII code B3875 Chevrolet in the future?

Regularly inspecting the windshield wiper system for any signs of wear or damage, such as frayed wiring or corroded connectors, can help prevent issues that may trigger this OBDII code in the future.