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B3717 Buick Code - Front Wiper Relay Drive Circuit Low

Quick Answer

The B3717 diagnostic trouble code (DTC) indicates a fault in the front wiper relay drive circuit, specifically signaling a low voltage condition. Common causes include A faulty wiper relay that is unable to maintain proper voltage levels, Damaged or corroded wiring in the wiper relay circuit, Poor connections at the relay, switch, or wiper motor. 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
B3717 Buick indicates Front Wiper Relay Drive Circuit Low.
Common causes
Common causes include A faulty wiper relay that is unable to maintain proper voltage levels, Damaged or corroded wiring in the wiper relay circuit, Poor connections at the relay, switch, or wiper motor.
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.
What is this?
Table of contents Created and updated by William Orellana on Oct 15, 2024
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Code B3717 Buick Description

The B3717 diagnostic trouble code (DTC) indicates a fault in the front wiper relay drive circuit, specifically signaling a low voltage condition. This code is primarily associated with Buick vehicles and pertains to the electronic control module (ECM) or body control module (BCM) that manages the operation of the windshield wipers. When the system detects that the voltage level in the wiper relay circuit is lower than expected, it triggers this code.

OBDII Code B3717 Buick - Front Wiper Relay Drive Circuit Low
B3717 Buick Code - Front Wiper Relay Drive Circuit Low

Common Causes of B3717 Buick

  1. A faulty wiper relay that is unable to maintain proper voltage levels.
  2. Damaged or corroded wiring in the wiper relay circuit.
  3. Poor connections at the relay, switch, or wiper motor.
  4. A malfunctioning body control module (BCM) or electronic control module (ECM).
  5. Short circuits or ground faults within the wiper system.

Symptoms of B3717 Buick

  1. Windshield wipers may not operate at all or may function intermittently.
  2. Wipers may operate at a reduced speed or only on certain settings.
  3. The windshield washer fluid pump may fail to activate.
  4. The wiper control switch may feel unresponsive or exhibit erratic behavior.
  5. Warning lights or messages may appear on the dashboard related to the wiper system.

How to Fix B3717 Buick

  1. Diagnostic Testing: Begin by using a multimeter to test the voltage at the wiper relay and associated wiring. This will help confirm the low voltage condition and identify the specific area of the circuit that is malfunctioning.
  2. Inspect Wiring and Connectors: Check for any visible damage, corrosion, or loose connections in the wiring harness leading to the wiper relay and motor. Repair or replace any damaged components as necessary.
  3. Replace the Wiper Relay: If the relay is found to be faulty, replacing it with a new one is often a straightforward solution that can resolve the low voltage issue.
  4. Test the Body Control Module (BCM): If the problem persists, further diagnostics may be needed to determine if the BCM is functioning correctly. Reprogramming or replacing the BCM may be necessary if it is found to be defective.
  5. Recheck System Functionality: After repairs, recheck the entire wiper system to ensure that it operates correctly across all settings and that the washer fluid pump functions as intended.

Cost to Fix B3717 Buick

The cost to repair the B3717 code can vary widely based on the specific issue identified during diagnostics. On average, you can expect to pay between $100 and $300 for parts and labor combined. A new wiper relay typically costs between $20 and $50, while labor costs can range from $80 to $150 per hour, depending on the shop's location and expertise. Keep in mind that diagnostic time can vary, and additional repairs may be needed if further issues are discovered. It's advisable to consult with local repair shops for more precise estimates based on your vehicle's make and model, as well as the specific nature of the problem.

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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 B3717 Buick Code

1. What does the OBDII code B3717 mean on a Buick?

The B3717 code indicates a problem with the front wiper relay drive circuit, specifically that it is experiencing a low voltage condition.

2. What are the common symptoms of code B3717 on a Buick?

Symptoms include non-functional or intermittently working front wipers, wipers stuck in one position, or wipers that do not respond to control inputs.

3. What causes the B3717 code on a Buick?

This code can be caused by a faulty wiper relay, damaged wiring in the wiper circuit, a defective wiper motor, or a problem with the body control module (BCM).

4. How is the B3717 code diagnosed?

A mechanic will typically use a scan tool to verify the code, inspect the wiper relay and wiring for damage, and test the wiper motor and BCM for proper function.

5. Can I still drive my Buick with the B3717 code?

Yes, you can drive the vehicle, but it is not recommended in rainy or snowy conditions, as non-functional wipers can impair visibility and compromise safety.

6. How do I fix the B3717 code on my Buick?

Repairs may include replacing the front wiper relay, repairing damaged wiring, replacing the wiper motor, or reprogramming or replacing the BCM if necessary.

7. How much does it cost to fix the B3717 code on a Buick?

The cost varies depending on the issue, but replacing a wiper relay typically costs $50–$150, while repairing wiring or replacing a wiper motor could cost $200–$400.

8. Can a blown fuse cause the B3717 code?

Yes, a blown fuse in the wiper circuit can lead to low voltage and trigger the B3717 code. The fuse should be checked and replaced if necessary.

9. Is the B3717 code common on Buick vehicles?

While not extremely common, this code can occur, especially in older models or vehicles that frequently use their wipers in harsh weather conditions.

10. Can I clear the B3717 code without repairs?

You can clear the code with an OBDII scanner, but if the underlying issue isn’t resolved, the code will likely return.

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