AutoCodes – Chevrolet – B3875 2017 Chevrolet Silverado

B3875 2017 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 2017 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 366

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 2017 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 2017 Chevrolet Silverado - Windshield Wiper High Speed Relay Circuit - AutoCodes.com — B3875 2017 Chevrolet Silverado Code - Windshield Wiper High Speed Relay Circuit

What does this mean?

What are the Possible Causes of the DTC B3875 2017 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 2017 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 2017 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 2017 Chevrolet Silverado code?

Need more information on how to fix the B3875 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B3875 2017 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 2017 Chevrolet Silverado Code

1. What does the OBDII code B3875 mean on a 2017 Chevrolet Silverado?

The code B3875 indicates an issue with the Windshield Wiper High-Speed Relay Circuit, which may prevent the wipers from functioning properly at high speed.

2. What are the common symptoms of code B3875 in a 2017 Chevrolet Silverado?

Symptoms include the windshield wipers not working at high speed, intermittent wiper operation failure, or the wipers being stuck in one speed or position.

3. What causes the B3875 code to appear?

Common causes include a faulty wiper high-speed relay, damaged wiring or connections in the wiper circuit, or a malfunctioning windshield wiper motor.

4. Can I still drive my Silverado with the B3875 code?

Yes, but itâ€™s not recommended in adverse weather conditions since the wipers may not function properly, reducing visibility and safety.

5. How do I diagnose the B3875 code on my Silverado?

Start by inspecting the wiper relay, wiring, and connectors for damage or corrosion. Use a multimeter to check for proper voltage and continuity in the circuit.

6. How do I fix the B3875 code on a 2017 Chevrolet Silverado?

Repairs may include replacing the high-speed relay, repairing or replacing damaged wiring, or replacing the windshield wiper motor if necessary.

7. Where is the windshield wiper high-speed relay located on a 2017 Silverado?

The high-speed relay is typically located in the under-hood fuse box. Refer to the ownerâ€™s manual or a wiring diagram for the exact location.

8. How much does it cost to fix the B3875 code on a Silverado?

The repair cost can vary but typically ranges from $50 to $200, depending on whether the issue is with the relay, wiring, or wiper motor.

9. Can a blown fuse cause the B3875 code?

A blown fuse is unlikely to cause this specific code, but checking all related fuses is a good step during diagnosis as it may point to other circuit issues.

10. Do I need to clear the B3875 code after repairs?

Yes, after completing repairs, use an OBDII scanner to clear the code and confirm that it does not return during operation.