AutoCodes – Generic – B1839

B1839 Code - Wiper Rear Motor Circuit Failure

Quick Answer

The Body Control Module (BCM) monitors the Wiper Rear Motor. Common causes include Faulty Wiper Rear Motor, Wiper Rear Motor harness is open or shorted, Wiper Rear Motor 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: B1839 indicates Wiper Rear Motor Circuit Failure.
Common causes: Common causes include Faulty Wiper Rear Motor, Wiper Rear Motor harness is open or shorted, Wiper Rear Motor 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 5,323

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 Jul 02, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1839 Description

The Body Control Module (BCM) monitors the Wiper Rear Motor. The BCM sets the OBDII code when the Wiper Rear Motor is not to factory specifications.

OBDII Code B1839 - Wiper Rear Motor Circuit Failure - AutoCodes.com — B1839 Code - Wiper Rear Motor Circuit Failure

What does this mean?

What are the Possible Causes of the DTC B1839?

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

How to Fix the DTC B1839?

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 B1839 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 B1839 code?

Need more information on how to fix the B1839 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1839 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 B1839 Code

1. What are common symptoms of OBDII code B1839 - Wiper Rear Motor Circuit Failure?

- Common symptoms include the rear wiper not functioning, erratic rear wiper operation, or complete lack of rear wiper movement.

2. What are possible causes of OBDII code B1839?

- Potential causes include a faulty rear wiper motor, damaged wiring or connectors in the rear wiper circuit, or a malfunctioning rear wiper switch.

3. How can I diagnose the issue related to OBDII code B1839?

- Diagnose by checking the rear wiper fuse, inspecting the rear wiper motor and its connections, and testing the rear wiper switch for proper functionality.

4. What are some tips for repairing OBDII code B1839 - Wiper Rear Motor Circuit Failure?

- Repair tips include replacing the rear wiper motor if faulty, repairing or replacing damaged wiring or connectors, and ensuring proper grounding in the rear wiper circuit.

5. Can a DIY enthusiast fix OBDII code B1839 at home?

- Yes, some basic automotive knowledge and tools are usually sufficient to diagnose and repair issues related to OBDII code B1839, such as replacing the rear wiper motor or fixing wiring problems.

6. Is it safe to continue driving with OBDII code B1839 active?

- It is generally safe to drive with this code, but it is recommended to address the issue promptly to ensure proper rear visibility in inclement weather conditions.

7. How much does it typically cost to repair OBDII code B1839?

- The cost of repair can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor.

8. Can OBDII code B1839 be triggered by a simple fuse issue?

- Yes, a blown rear wiper fuse can sometimes trigger OBDII code B1839, so it's important to check and replace the fuse if necessary before proceeding with further diagnostics.

9. Are there any preventative maintenance measures to avoid OBDII code B1839 in the future?

- Regularly inspecting the rear wiper system, keeping it clean, and addressing any minor issues promptly can help prevent OBDII code B1839 from occurring.

10. Will resetting the OBDII system clear the B1839 code temporarily?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing B1839 is not fixed, the code is likely to reappear. It's best to diagnose and address the root cause of the problem.