AutoCodes – GMC – B3922 GMC

B3922 GMC Code - Front Wiper Function Select Circuit

Quick Answer

The Body Control Module (BCM) monitors the windshield wiper switch low signal circuit. Common causes include Faulty Turn Signal/Multifunction Switch, Turn Signal/Multifunction Switch harness is open or shorted, Turn Signal/Multifunction Switch 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: B3922 GMC indicates Front Wiper Function Select Circuit.
Common causes: Common causes include Faulty Turn Signal/Multifunction Switch, Turn Signal/Multifunction Switch harness is open or shorted, Turn Signal/Multifunction Switch 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 745

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 25, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3922 GMC Description

The Body Control Module (BCM) monitors the windshield wiper switch low signal circuit. When the wiper switch is place in the low position, battery voltage is applied through the switch contacts, a series of resistors, and the wiper switch low signal circuit to the BCM. The BCM then applies battery voltage through the wiper relay control circuit to energize the WPR Relay. When energized, battery voltage from the WPR Fuse is applied through the switch side of the WPR relay then through the switch side of the WPR HI relay to the windshield wiper motor. The Diagnostic Trouble Code (DTC) sets when the BCM detects a short to ground on the windshield wiper switch low signal circuit.

OBDII Code B3922 GMC - Front Wiper Function Select Circuit - AutoCodes.com — B3922 GMC Code - Front Wiper Function Select Circuit

What does this mean?

What are the Possible Causes of the DTC B3922 GMC?

Faulty Turn Signal/Multifunction Switch
Turn Signal/Multifunction Switch harness is open or shorted
Turn Signal/Multifunction Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B3922 GMC?

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 B3922 GMC 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 B3922 GMC code?

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Need Help with the 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 B3922 GMC Code

1. What are the common symptoms of OBDII code B3922 GMC (Front Wiper Function Select Circuit)?

- Common symptoms include erratic front wiper operation, wipers not working properly, or wipers not turning off.

2. What causes the OBDII code B3922 GMC to appear?

- The code may be triggered by a faulty front wiper function select switch, damaged wiring, or a malfunctioning wiper control module.

3. How can I diagnose the issue related to the Front Wiper Function Select Circuit?

- You can use a diagnostic scanner to read the OBDII code, visually inspect the wiring for any damage, and test the front wiper function select switch for continuity.

4. Are there any quick fixes for resolving the B3922 GMC trouble code?

- Quick fixes may include checking and replacing blown fuses related to the wiper system, ensuring the wiper blades are not obstructed, and resetting the wiper control module.

5. What are some repair tips for addressing the Front Wiper Function Select Circuit issue?

- Repair tips include replacing the front wiper function select switch if faulty, repairing any damaged wiring, and recalibrating the wiper control module.

6. Can a DIY enthusiast fix the B3922 GMC code related to the front wiper function?

- Depending on your skill level and access to tools, you may be able to address this issue yourself by following a repair manual specific to your GMC model.

7. Is it safe to continue driving with the B3922 trouble code present?

- It is not recommended to continue driving with the code unresolved, as it may lead to further wiper system malfunctions, compromising visibility during inclement weather.

8. How do I reset the OBDII code B3922 GMC after repairing the Front Wiper Function Select Circuit issue?

- You can reset the code using an OBDII scanner or by disconnecting the car battery for a few minutes to clear the error code from the system.

9. Are there any recalls or technical service bulletins related to the B3922 GMC trouble code?

- It's advisable to check with your GMC dealership or online databases for any relevant recalls or technical service bulletins regarding this specific OBDII code.

10. What should I do if I have tried all troubleshooting steps and the OBDII code B3922 GMC persists?

- If the code persists after checking all possible causes and performing necessary repairs, it may be best to consult with a professional mechanic or dealership for further diagnosis and resolution.