AutoCodes – Chevrolet – B3718 Chevrolet

B3718 Chevrolet Code - Front Wiper Relay Drive Circuit High

Quick Answer

The Body Control Module (BCM) monitors the control circuit of the wiper relay. Common causes include Faulty Front Wiper Relay, Front Wiper Relay harness is open or shorted, Front 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: B3718 Chevrolet indicates Front Wiper Relay Drive Circuit High.
Common causes: Common causes include Faulty Front Wiper Relay, Front Wiper Relay harness is open or shorted, Front 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 3,455

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 Mar 15, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3718 Chevrolet Description

The Body Control Module (BCM) monitors the control circuit of the wiper relay. The voltage level should be low while the wiper relay is de-energized and near system voltage when the relay is energized. After the BCM receives a low, intermittent, or mist signal from the wiper/washer switch, it responds by applying battery voltage through the wiper relay control circuit to the coil side of the relay, energizing the wiper relay. The Diagnostic Trouble Code (DTC) sets if the BCM detects a short to battery voltage in the wiper relay control circuit.

OBDII Code B3718 Chevrolet - Front Wiper Relay Drive Circuit High - AutoCodes.com — B3718 Chevrolet Code - Front Wiper Relay Drive Circuit High

What does this mean?

What are the Possible Causes of the DTC B3718 Chevrolet?

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

How to Fix the DTC B3718 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 B3718 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 B3718 Chevrolet 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 B3718 Chevrolet Code

1. What are the common symptoms of OBDII code B3718 in a Chevrolet related to the Front Wiper Relay Drive Circuit High?

When this code is present, you may experience issues such as the front wipers not working properly or failing to turn off.

2. What are some possible causes of OBDII code B3718 in a Chevrolet indicating Front Wiper Relay Drive Circuit High?

Common causes include a faulty front wiper relay, damaged wiring or connectors in the circuit, or a problem with the wiper motor itself.

3. How can I diagnose the OBDII code B3718 in a Chevrolet for the Front Wiper Relay Drive Circuit High?

Diagnosing this code typically involves checking the front wiper relay, inspecting the wiring for any damage, and testing the wiper motor to identify the root cause of the circuit high issue.

4. Can a DIY enthusiast repair OBDII code B3718 in a Chevrolet related to the Front Wiper Relay Drive Circuit High?

If you have experience working with automotive electrical systems, you may be able to repair this issue by replacing the faulty relay, repairing damaged wiring, or addressing any other identified problems in the circuit.

5. Is it safe to continue driving a Chevrolet with OBDII code B3718 indicating Front Wiper Relay Drive Circuit High?

It is not recommended to drive the vehicle with this code present, as it can lead to further wiper system malfunctions and compromise visibility during inclement weather.

6. What are some tips for preventing OBDII code B3718 in a Chevrolet related to the Front Wiper Relay Drive Circuit High?

Regularly inspecting the wiper system, ensuring proper maintenance, and addressing any wiper-related issues promptly can help prevent this code from occurring.

7. How can a mechanic reset OBDII code B3718 in a Chevrolet after repairing the Front Wiper Relay Drive Circuit High issue?

After repairing the underlying problem, a mechanic can use an OBDII scanner to clear the code from the vehicle's system and reset the warning light.

8. Are there any related codes that may appear alongside OBDII code B3718 in a Chevrolet with Front Wiper Relay Drive Circuit High issues?

Depending on the specific circumstances, additional codes related to the wiper system or electrical circuitry may also be present and should be addressed during diagnosis and repair.

9. What are the potential risks of ignoring OBDII code B3718 in a Chevrolet indicating Front Wiper Relay Drive Circuit High?

Ignoring this code can result in continued wiper system malfunctions, potential safety hazards due to impaired visibility, and may lead to more extensive repairs if left unresolved.

10. Is it necessary to visit a dealership for repairs when encountering OBDII code B3718 in a Chevrolet related to Front Wiper Relay Drive Circuit High?

While dealership service centers may have specialized knowledge, independent repair shops with experience in electrical systems and wiper repairs can also effectively diagnose and repair this issue.