AutoCodes – Generic – B1843

B1843 Code - Wiper Front Power Circuit Short To Ground

Quick Answer

The Body Control Module (BCM) monitors the Wiper Front Power Motor. Common causes include Faulty Wiper Front Power Motor, Wiper Front Power Motor harness is open or shorted, Wiper Front Power 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: B1843 indicates Wiper Front Power Circuit Short To Ground.
Common causes: Common causes include Faulty Wiper Front Power Motor, Wiper Front Power Motor harness is open or shorted, Wiper Front Power 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 5,079

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 B1843 Description

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

OBDII Code B1843 - Wiper Front Power Circuit Short To Ground - AutoCodes.com — B1843 Code - Wiper Front Power Circuit Short To Ground

What does this mean?

What are the Possible Causes of the DTC B1843?

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

How to Fix the DTC B1843?

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 B1843 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 B1843 code?

Need more information on how to fix the B1843 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1843 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1843 Lexus — Short To Positive In Curtain Shield Squib Right 2nd Step Circuit
B1843 Scion — Short To Positive In Curtain Shield Squib Right 2nd Step Circuit
B1843 Toyota — Short To Positive In Curtain Shield Squib Right 2nd Step Circuit

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 B1843 Code

1. What are the common symptoms of OBDII code B1843 (Wiper Front Power Circuit Short To Ground)?

Typical symptoms include non-functioning wipers, wipers moving erratically, or wipers getting stuck in one position.

2. What are the possible causes of OBDII code B1843?

Causes can include damaged wiring, a faulty wiper motor, a blown fuse, or a malfunctioning wiper switch.

3. How can I diagnose the issue related to OBDII code B1843?

You can start by visually inspecting the wiper system components, checking the wiring for damage, testing the wiper motor, and using a multimeter to check for shorts to ground.

4. Are there any repair tips for fixing OBDII code B1843?

Repair tips include repairing or replacing damaged wiring, replacing the wiper motor if necessary, checking and replacing the fuse, and ensuring proper connections at the wiper switch.

5. Can I drive my vehicle with OBDII code B1843 present?

It is not recommended to drive your vehicle with this code active, as malfunctioning wipers can compromise visibility and safety while driving in various weather conditions.

6. How much does it typically cost to repair OBDII code B1843?

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.

7. Can I reset OBDII code B1843 on my own?

Yes, you can reset the code using an OBDII scanner or by disconnecting the car battery for a few minutes. However, it is important to diagnose and address the underlying issue to prevent the code from reoccurring.

8. Is OBDII code B1843 a common issue in vehicles?

This code is relatively common in vehicles with wiper system problems, especially in older cars or those exposed to harsh weather conditions.

9. Will OBDII code B1843 cause my check engine light to illuminate?

Yes, the presence of this code will typically trigger the check engine light to come on, signaling an issue with the wiper front power circuit short to ground.

10. How can I prevent OBDII code B1843 from occurring again in the future?

Regularly inspecting and maintaining your vehicle's wiper system, avoiding overloading the wipers with snow or ice, and addressing any electrical issues promptly can help prevent this code from reoccurring.