AutoCodes – Pontiac – B3718 Pontiac

B3718 Pontiac 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 Pontiac 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 438

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

What does this mean?

What are the Possible Causes of the DTC B3718 Pontiac?

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 Pontiac?

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 Pontiac 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.

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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 Pontiac Code

1. What are the common symptoms of OBDII code B3718 (Front Wiper Relay Drive Circuit High) in a Pontiac?

- The common symptoms include the front wipers not working, wipers operating at a single speed, or the wipers not turning off.

2. What can cause the OBDII code B3718 in a Pontiac?

- The code B3718 in a Pontiac is commonly caused by a faulty front wiper relay, damaged wiper motor, wiring issues, or a malfunctioning wiper switch.

3. How can I diagnose the OBDII code B3718 in my Pontiac?

- Diagnose the code by checking the front wiper relay, inspecting the wiper motor and its connections, testing the wiper switch, and examining the wiring for any damage or loose connections.

4. Can a DIY enthusiast repair the OBDII code B3718 in a Pontiac?

- Depending on your skill level, you may be able to replace the front wiper relay, wiper motor, or repair wiring issues yourself. However, if you are unsure, it's best to consult a professional mechanic.

5. Are there any quick tips to fix the OBDII code B3718 in a Pontiac?

- Quick tips include checking the wiper fuse, ensuring the wiper arms are not stuck, and verifying the wiper switch is functioning correctly before diving into more complex repairs.

6. Is it safe to drive my Pontiac with the OBDII code B3718 present?

- It is not recommended to drive your Pontiac with the B3718 code, as malfunctioning wipers can compromise visibility during adverse weather conditions, increasing the risk of an accident.

7. How much does it typically cost to repair the OBDII code B3718 in a Pontiac?

- The cost of repairing the B3718 code in a Pontiac can vary depending on the root cause of the issue, but it may range from $100 to $300 for parts and labor.

8. Can extreme weather conditions trigger the OBDII code B3718 in a Pontiac?

- Yes, extreme weather conditions such as heavy rain, snow, or ice can put additional strain on the wiper system and potentially lead to the B3718 code being triggered.

9. Will resetting the OBDII code B3718 in my Pontiac make it go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue causing the B3718 code is not fixed, the code is likely to reappear.

10. How can I prevent the OBDII code B3718 from occurring in my Pontiac in the future?

- To prevent the B3718 code, regularly inspect and maintain your wiper system, replace worn-out components promptly, and address any electrical issues as soon as they arise.