AutoCodes – Cadillac – B3718 Cadillac

B3718 Cadillac 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 Cadillac 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 488

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

What does this mean?

What are the Possible Causes of the DTC B3718 Cadillac?

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 Cadillac?

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 Cadillac 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 Cadillac Code

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

- Common symptoms include the front wipers not working, wipers operating at an incorrect speed, or wipers getting stuck in one position.

2. What are the possible causes of OBDII code B3718 in a Cadillac?

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

3. How can I diagnose the Front Wiper Relay Drive Circuit High issue in my Cadillac?

- To diagnose this issue, you can perform a visual inspection of the wiper relay and associated wiring, check for loose or corroded connections, and use a multimeter to test the relay and motor for proper functionality.

4. Is it safe to continue driving my Cadillac with OBDII code B3718 triggered?

- It is not recommended to drive your Cadillac with this code active, as it can impair your visibility during adverse weather conditions and compromise your safety on the road.

5. Can I repair OBDII code B3718 in my Cadillac myself?

- Depending on your level of automotive expertise, you may be able to repair this issue yourself by replacing the front wiper relay, repairing damaged wiring, or addressing any loose connections in the circuit.

6. Will resetting the OBDII code B3718 in my Cadillac make the issue go away?

- Resetting the code may temporarily clear the error message, but if the underlying issue causing the Front Wiper Relay Drive Circuit High is not fixed, the code is likely to reappear.

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

- The cost of repairing this code can vary depending on the specific cause of the issue. Replacing a faulty front wiper relay can cost between $50 to $150, while addressing wiring or motor problems may incur additional expenses.

8. Can extreme weather conditions contribute to triggering OBDII code B3718 in a Cadillac?

- Yes, extreme weather conditions like heavy rain, snow, or ice can put additional strain on the front wiper system, potentially leading to issues that trigger the Front Wiper Relay Drive Circuit High code.

9. Are there any preventive measures I can take to avoid encountering OBDII code B3718 in my Cadillac?

- Regularly inspecting and maintaining your front wiper system, ensuring all connections are secure, and promptly addressing any issues with wiper operation can help prevent the occurrence of this code.

10. Can a mechanic use a diagnostic tool to pinpoint the exact cause of OBDII code B3718 in my Cadillac?

- Yes, a mechanic can use an OBDII scanner to retrieve specific diagnostic trouble codes, including B3718, and perform further tests to identify the root cause of the Front Wiper Relay Drive Circuit High issue.