AutoCodes – GMC – B3715 2018 GMC Sierra

B3715 2018 GMC Sierra Code - Windshield Wiper Relay Drive 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: B3715 2018 GMC Sierra indicates Windshield Wiper Relay Drive 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 195

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 B3715 2018 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 B3715 2018 GMC Sierra - Windshield Wiper Relay Drive Circuit - AutoCodes.com — B3715 2018 GMC Sierra Code - Windshield Wiper Relay Drive Circuit

What does this mean?

What are the Possible Causes of the DTC B3715 2018 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 B3715 2018 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 B3715 2018 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 B3715 2018 GMC Sierra 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 B3715 2018 GMC Sierra Code

1. What does OBDII code B3715 mean on a 2018 GMC Sierra?

Code B3715 refers to a fault in the windshield wiper relay drive circuit, indicating an issue with the electrical circuit controlling the wiper relay.

2. What are the common symptoms of code B3715 in a 2018 GMC Sierra?

Symptoms include the windshield wipers not functioning, wipers stuck in one position, or wipers operating intermittently or erratically.

3. What causes code B3715 in a 2018 GMC Sierra?

Common causes include a faulty wiper relay, damaged wiring or connectors in the wiper circuit, or a malfunctioning body control module (BCM).

4. How can I diagnose code B3715 on my 2018 GMC Sierra?

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.

5. Can a bad wiper motor cause code B3715 on a 2018 GMC Sierra?

No, this code specifically relates to the wiper relay drive circuit, not the motor itself. However, a faulty relay or electrical issue may indirectly affect motor operation.

6. How do I fix code B3715 on my 2018 GMC Sierra?

Repairs may include replacing the wiper relay, repairing damaged wiring or connectors, or reprogramming or replacing the body control module if necessary.

7. Is it safe to drive a 2018 GMC Sierra with code B3715?

While the vehicle may still be drivable, non-functional wipers can impair visibility in rain or snow, making it unsafe. Address the issue promptly.

8. How much does it cost to repair code B3715 on a 2018 GMC Sierra?

Repair costs vary but typically range from $50 to $150 for parts like a new relay, and higher if BCM replacement or reprogramming is needed.

9. Can I clear code B3715 without making repairs?

Clearing the code with a scan tool may temporarily remove it, but if the underlying issue isnâ€™t resolved, the code and symptoms will likely return.

10. What tools do I need to troubleshoot code B3715 on a 2018 GMC Sierra?

Youâ€™ll need a scan tool capable of reading body control module codes, a multimeter for electrical testing, and basic tools for inspecting and repairing wiring or components.