AutoCodes – GMC – B3875 2014 GMC Sierra

B3875 2014 GMC Sierra 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 2014 GMC Sierra 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 275

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 2014 GMC Sierra 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 2014 GMC Sierra - Windshield Wiper High Speed Relay Circuit - AutoCodes.com — B3875 2014 GMC Sierra Code - Windshield Wiper High Speed Relay Circuit

What does this mean?

What are the Possible Causes of the DTC B3875 2014 GMC Sierra?

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 2014 GMC Sierra?

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 2014 GMC Sierra 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 2014 GMC Sierra code?

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Need Help with the Code?

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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 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code B3875 in a 2014 GMC Sierra related to the Windshield Wiper High Speed Relay Circuit?

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

2. What are the possible causes of OBDII code B3875 in a 2014 GMC Sierra associated with the Windshield Wiper High Speed Relay Circuit?

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

3. How can I diagnose the Windshield Wiper High Speed Relay Circuit issue triggering OBDII code B3875 in my 2014 GMC Sierra?

- Use a multimeter to test the high-speed relay, check for continuity in the wiring, inspect the wiper motor for any signs of damage, and ensure all connections are secure.

4. Can a DIY enthusiast repair OBDII code B3875 in a 2014 GMC Sierra related to the Windshield Wiper High Speed Relay Circuit?

- Yes, if you have basic electrical knowledge and the necessary tools, you may be able to repair the issue by replacing the faulty relay, repairing damaged wiring, or fixing the wiper motor.

5. Is it safe to continue driving my 2014 GMC Sierra with OBDII code B3875 triggered by the Windshield Wiper High Speed Relay Circuit problem?

- It is not recommended to drive the vehicle in heavy rain or adverse weather conditions as the windshield wipers may not function properly. It's best to address the issue promptly.

6. How do I reset OBDII code B3875 in a 2014 GMC Sierra after repairing the Windshield Wiper High Speed Relay Circuit problem?

- To reset the code, use an OBDII scanner to clear the diagnostic trouble codes stored in the vehicle's computer after the repair has been completed successfully.

7. Are there any preventive maintenance tips to avoid encountering OBDII code B3875 in a 2014 GMC Sierra due to Windshield Wiper High Speed Relay Circuit issues?

- Regularly inspect and maintain the windshield wiper system, including checking the relays, wiring, and motor for any signs of wear or damage to prevent potential issues.

8. How crucial is it to address OBDII code B3875 in a 2014 GMC Sierra related to the Windshield Wiper High Speed Relay Circuit promptly?

- Promptly addressing the issue is essential to ensure the proper functioning of the windshield wipers, which are crucial for visibility and safety while driving, especially in adverse weather conditions.

9. Can extreme weather conditions contribute to triggering OBDII code B3875 in a 2014 GMC Sierra associated with the Windshield Wiper High Speed Relay Circuit?

- Yes, extreme weather conditions such as heavy rain, snow, or ice can put additional strain on the wiper system components, potentially leading to issues like relay failures or circuit disruptions.

10. How long does it typically take to repair OBDII code B3875 in a 2014 GMC Sierra caused by problems in the Windshield Wiper High Speed Relay Circuit?

- The repair time can vary depending on the specific issue, but simple fixes like relay replacement may take around 30 minutes to an hour, while more complex problems could require longer troubleshooting and repair time.