AutoCodes – Generic – B1819

B1819 Code - Wiper Rear Motor Up Relay Coil Circuit Open

Quick Answer

The Body Control Module (BCM) monitors the Wiper Rear Motor Up Relay. Common causes include Faulty Wiper Rear Motor Up Relay, Wiper Rear Motor Up Relay harness is open or shorted, Wiper Rear Motor Up 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: B1819 indicates Wiper Rear Motor Up Relay Coil Circuit Open.
Common causes: Common causes include Faulty Wiper Rear Motor Up Relay, Wiper Rear Motor Up Relay harness is open or shorted, Wiper Rear Motor Up 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 3,500

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 B1819 Description

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

OBDII Code B1819 - Wiper Rear Motor Up Relay Coil Circuit Open - AutoCodes.com — B1819 Code - Wiper Rear Motor Up Relay Coil Circuit Open

What does this mean?

What are the Possible Causes of the DTC B1819?

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

How to Fix the DTC B1819?

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 B1819 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 B1819 code?

Need more information on how to fix the B1819 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1819 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 B1819 Code

1. What are the common symptoms of OBDII code B1819?

- The common symptoms include the rear wiper motor not functioning, rear wiper not moving or stopping unexpectedly, and possibly a rear wiper that only works intermittently.

2. What can cause the OBDII code B1819 to trigger?

- The code B1819 is triggered when there is an open circuit detected in the rear wiper motor up relay coil circuit, indicating a problem with the electrical connection.

3. How can I diagnose the issue related to OBDII code B1819?

- To diagnose the issue, you can start by checking the wiring and connections related to the rear wiper motor up relay coil. Using a multimeter to test for continuity and inspecting for any visible damage can help pinpoint the problem.

4. Is it safe to continue driving with OBDII code B1819 triggered?

- While the vehicle may still be operable with the rear wiper malfunctioning, it is recommended to address the issue promptly to ensure proper functionality of the rear wiper system, especially in adverse weather conditions.

5. Can I repair OBDII code B1819 on my own?

- Repairing OBDII code B1819 may require some electrical knowledge and experience with automotive wiring. If you are comfortable working with electrical systems, you may be able to repair the issue yourself by fixing the open circuit in the rear wiper motor up relay coil circuit.

6. How much does it typically cost to repair OBDII code B1819 at a mechanic or dealership?

- The cost of repairing OBDII code B1819 can vary depending on the labor rates and parts required. It is advisable to contact a mechanic or dealership for an accurate estimate based on your specific vehicle and location.

7. Are there any preventive measures to avoid OBDII code B1819 in the future?

- Regularly inspecting and maintaining the rear wiper system, including checking the wiring and connections for any signs of wear or damage, can help prevent issues like OBDII code B1819 from occurring.

8. Can extreme weather conditions contribute to triggering OBDII code B1819?

- Yes, extreme weather conditions such as heavy rain, snow, or temperature fluctuations can potentially affect the electrical components of the rear wiper system and contribute to triggering OBDII code B1819.

9. Will resetting the OBDII code B1819 resolve the issue temporarily?

- Resetting the OBDII code B1819 may temporarily clear the error code, but if the underlying issue with the rear wiper motor up relay coil circuit is not addressed, the code is likely to reappear once the system detects the fault again.

10. Is it necessary to replace the rear wiper motor to fix OBDII code B1819?

- In some cases, the issue causing OBDII code B1819 may be resolved by repairing the open circuit in the rear wiper motor up relay coil circuit without needing to replace the entire rear wiper motor.