AutoCodes – Cadillac – B3922 Cadillac

B3922 Cadillac 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 Cadillac 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 525

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

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

What does this mean?

What are the Possible Causes of the DTC B3922 Cadillac?

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 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 B3922 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.

Need more information about the B3922 Cadillac code?

Need more information on how to fix the B3922 Cadillac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B3922 Cadillac code diagnosed by a professional: Find a repair shop in your area

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 Cadillac Code

1. What does the OBDII code B3922 mean on a Cadillac?

The B3922 code indicates a problem with the Front Wiper Function Select Circuit, which controls the operation of the windshield wipers.

2. What are the common symptoms of the B3922 code in a Cadillac?

Symptoms include non-functioning or intermittent windshield wipers, wipers stuck in one position, or erratic wiper operation.

3. What causes the B3922 code to appear?

Common causes include a faulty wiper switch, damaged wiring or connectors in the wiper circuit, or a malfunctioning windshield wiper motor.

4. Can a blown fuse trigger the B3922 code in a Cadillac?

Yes, a blown fuse in the wiper circuit can interrupt power and trigger the B3922 code.

5. How is the B3922 code diagnosed?

A technician will inspect the wiper switch, wiring, and motor for damage or faults, and use a diagnostic scan tool to confirm the code and test the circuit.

6. Can I drive my Cadillac with the B3922 code active?

While the car is drivable, lack of properly functioning wipers can be unsafe in rain or snow, so itâ€™s important to address the issue promptly.

7. How do I fix the B3922 code on my Cadillac?

Repairs may involve replacing the wiper switch, repairing or replacing damaged wiring, or replacing the windshield wiper motor if itâ€™s faulty.

8. How much does it cost to repair the B3922 code in a Cadillac?

The cost depends on the specific issue, but it can range from $50 for a fuse replacement to $300 or more for a new wiper motor or switch.

9. Can I reset the B3922 code without fixing the problem?

You can clear the code with a scan tool, but it will likely return if the underlying issue isnâ€™t resolved.

10. Is the B3922 code common in Cadillacs?

Itâ€™s not overly common, but it can occur in vehicles with aging electrical components or after exposure to water or corrosion.

Discuss the causes and fixes for B3922 Cadillac OBDII Code

Submit a New Comment

Code B3922 Cadillac comments

No comments found for this page.

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.