AutoCodes – Generic – B3810

B3810 Code - Headlamp Washer Relay Circuit

Quick Answer

The Body Control Module (BCM) provides a high side drive output through the headlamp washer relay control circuit that controls the headlamp washer relay. Common causes include Faulty Headlamp Washer Relay, Headlamp Washer Relay harness is open or shorted, Headlamp Washer 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: B3810 indicates Headlamp Washer Relay Circuit.
Common causes: Common causes include Faulty Headlamp Washer Relay, Headlamp Washer Relay harness is open or shorted, Headlamp Washer 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 1,727

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 17, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3810 Description

The Body Control Module (BCM) provides a high side drive output through the headlamp washer relay control circuit that controls the headlamp washer relay. The Diagnostic Trouble Code (DTC) sets when the BCM detects a short to ground in the headlamp washer relay control circuit when the output is active or when the BCM detects a short to battery voltage or an open in the headlamp washer relay control circuit when the output is inactive.

OBDII Code B3810 - Headlamp Washer Relay Circuit - AutoCodes.com — B3810 Code - Headlamp Washer Relay Circuit

What does this mean?

What are the Possible Causes of the DTC B3810?

Faulty Headlamp Washer Relay
Headlamp Washer Relay harness is open or shorted
Headlamp Washer Relay circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B3810?

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 B3810 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 B3810 code?

Need more information on how to fix the B3810 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B3810 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B3810 Buick — Headlamp Washer Relay Circuit
B3810 Cadillac — Headlamp Washer Relay Circuit
B3810 Chevrolet — Headlamp Washer Relay Circuit
B3810 GMC — Headlamp Washer Relay 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 B3810 Code

1. What are the common symptoms of OBDII code B3810 (Headlamp Washer Relay Circuit)?

The common symptoms of code B3810 include inoperative headlamp washer system, failure of headlamp washers to spray fluid, or erratic operation of the headlamp washer system.

2. What are some possible causes of OBDII code B3810 (Headlamp Washer Relay Circuit)?

Possible causes of code B3810 include a faulty headlamp washer relay, damaged wiring or connectors in the headlamp washer circuit, or a malfunctioning headlamp washer pump.

3. How can I diagnose OBDII code B3810 (Headlamp Washer Relay Circuit)?

To diagnose code B3810, you can start by visually inspecting the headlamp washer system components, checking the wiring and connectors for any damage, and using a multimeter to test the headlamp washer relay for proper functioning.

4. Can I still drive my vehicle with OBDII code B3810 (Headlamp Washer Relay Circuit)?

It is generally safe to drive your vehicle with code B3810, as it primarily affects the headlamp washer system and does not impact the overall drivability of the vehicle.

5. How can I repair OBDII code B3810 (Headlamp Washer Relay Circuit)?

Repairing code B3810 may involve replacing the faulty headlamp washer relay, repairing or replacing damaged wiring or connectors, or addressing any issues with the headlamp washer pump.

6. Are there any DIY tips for fixing OBDII code B3810 (Headlamp Washer Relay Circuit)?

DIY tips for fixing code B3810 include checking the fuse related to the headlamp washer system, ensuring there is washer fluid in the reservoir, and performing a visual inspection of the headlamp washer components for any obvious issues.

7. Will resetting the OBDII code B3810 (Headlamp Washer Relay Circuit) make it go away permanently?

Resetting the code may temporarily clear it, but if the underlying issue causing code B3810 is not addressed, the code is likely to return.

8. How do I prevent OBDII code B3810 (Headlamp Washer Relay Circuit) from recurring?

To prevent code B3810 from recurring, regularly inspect and maintain the headlamp washer system, promptly address any washer system issues, and ensure proper functioning of the headlamp washer relay.

9. Can extreme weather conditions trigger OBDII code B3810 (Headlamp Washer Relay Circuit)?

Extreme weather conditions, such as freezing temperatures, can potentially impact the headlamp washer system and contribute to issues that may trigger code B3810.

10. Is it necessary to visit a mechanic for OBDII code B3810 (Headlamp Washer Relay Circuit) or can I fix it myself?

Depending on your level of automotive expertise and access to tools, you may be able to fix code B3810 yourself. However, if you are unsure about diagnosing or repairing the issue, it is advisable to seek assistance from a qualified mechanic.