AutoCodes – Buick – B3723 Buick

B3723 Buick Code - Rear Wiper Relay Drive Circuit High

Quick Answer

When operation of the rear wiper is selected, battery voltage from the rear wiper switch is applied to the rear wiper switch signal input circuit of the Body Control Module (BCM)). Common causes include Faulty Rear Wiper Relay, Rear Wiper Relay harness is open or shorted, Rear 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: B3723 Buick indicates Rear Wiper Relay Drive Circuit High.
Common causes: Common causes include Faulty Rear Wiper Relay, Rear Wiper Relay harness is open or shorted, Rear 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 461

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 B3723 Buick Description

When operation of the rear wiper is selected, battery voltage from the rear wiper switch is applied to the rear wiper switch signal input circuit of the Body Control Module (BCM)). The BCM responds by switching the rear wiper relay control circuit to ground. This action energizes the rear wiper relay, providing power to the rear wiper motor. The Diagnostic Trouble Code (DTC) sets when the rear wiper relay control circuit is shorted to battery.

OBDII Code B3723 Buick - Rear Wiper Relay Drive Circuit High - AutoCodes.com — B3723 Buick Code - Rear Wiper Relay Drive Circuit High

What does this mean?

What are the Possible Causes of the DTC B3723 Buick?

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

How to Fix the DTC B3723 Buick?

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 B3723 Buick 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 B3723 Buick Code

1. What are the common symptoms of OBDII code B3723 Buick (Rear Wiper Relay Drive Circuit High)?

The common symptoms include the rear wiper not functioning properly or not working at all, irregular wiper operation, and potential issues with the rear wiper relay.

2. What can cause OBDII code B3723 Buick to trigger?

The code B3723 can be triggered by a faulty rear wiper relay, damaged wiring or connectors in the rear wiper circuit, or a malfunctioning rear wiper motor.

3. How can I diagnose the cause of OBDII code B3723 Buick?

To diagnose the issue, you can start by checking the rear wiper relay, inspecting the wiring and connectors in the rear wiper circuit for any damage, and testing the rear wiper motor for proper functionality.

4. Is it safe to continue driving with OBDII code B3723 Buick present?

It is recommended not to drive with the code present, as the rear wiper functionality may be compromised, especially in adverse weather conditions where visibility is crucial.

5. Can I repair OBDII code B3723 Buick myself?

If you have experience with automotive electrical systems, you may be able to repair the issue yourself by replacing the rear wiper relay, repairing damaged wiring or connectors, or replacing the rear wiper motor if necessary.

6. Are there any common fixes for OBDII code B3723 Buick?

Common fixes for this code include replacing the rear wiper relay, repairing any damaged wiring or connectors in the circuit, and ensuring the rear wiper motor is functioning correctly.

7. How important is it to address OBDII code B3723 Buick promptly?

It is important to address the code promptly to ensure the proper functioning of the rear wiper, which is essential for visibility and safety while driving in various weather conditions.

8. Can extreme weather conditions contribute to triggering OBDII code B3723 Buick?

Extreme weather conditions, such as heavy rain, snow, or ice, can put additional strain on the rear wiper system, potentially leading to issues that trigger the B3723 code.

9. Will resetting the OBDII system clear code B3723 Buick?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue, such as a faulty relay or damaged wiring, is not addressed, the code is likely to reappear.

10. How can I prevent OBDII code B3723 Buick from recurring in the future?

To prevent the code from recurring, it is important to perform regular maintenance checks on the rear wiper system, including inspecting the relay, wiring, and motor for any signs of wear or damage.