AutoCodes – Chevrolet – B3650 Chevrolet

B3650 Chevrolet Code - High Beam Request Signal Circuit Performance Signal Invalid

Quick Answer

When the low beam headlamps are on and the turn signal/multifunction switch is placed in the high beam position, ground is applied to the Body Control Module (BCM) through the high beam 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: B3650 Chevrolet indicates High Beam Request Signal Circuit Performance Signal Invalid.
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.

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Code Popularity 936

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 Jun 14, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3650 Chevrolet Description

When the low beam headlamps are on and the turn signal/multifunction switch is placed in the high beam position, ground is applied to the Body Control Module (BCM) through the high beam signal circuit. The BCM responds to the high beam request by applying ground to the high beam relay control circuit which energizes the high beam relay. With the high beam relay energized, the switch contacts close allowing battery voltage to flow through the high beam fuses to the high beam control circuits illuminating the high beam headlamps. The Diagnostic Trouble Code (DTC) sets when the BCM detects a short to ground in the turn signal/multifunction switch high beam signal circuit.

OBDII Code B3650 Chevrolet - High Beam Request Signal Circuit Performance Signal Invalid - AutoCodes.com — B3650 Chevrolet Code - High Beam Request Signal Circuit Performance Signal Invalid

What does this mean?

What are the Possible Causes of the DTC B3650 Chevrolet?

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 B3650 Chevrolet?

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 B3650 Chevrolet 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 B3650 Chevrolet code?

Need more information on how to fix the B3650 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B3650 Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

B3650 2014 Chevrolet Silverado — High Beam Request Signal Circuit Performance Signal Invalid
B3650 2015 Chevrolet Silverado — High Beam Request Signal Circuit Performance Signal Invalid
B3650 2016 Chevrolet Silverado — High Beam Request Signal Circuit Performance Signal Invalid
B3650 2017 Chevrolet Silverado — High Beam Request Signal Circuit Performance Signal Invalid
B3650 2018 Chevrolet Silverado — High Beam Request Signal Circuit Performance Signal Invalid

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 B3650 Chevrolet Code

1. What are the common symptoms of OBDII code B3650 in a Chevrolet related to the High Beam Request Signal Circuit Performance Signal Invalid?

The common symptoms include malfunctioning high beam headlights, issues with the high beam switch functionality, and potential dashboard warning lights related to the lighting system.

2. What could be the possible causes of OBDII code B3650 in a Chevrolet indicating High Beam Request Signal Circuit Performance Signal Invalid?

Possible causes include a faulty high beam switch, wiring issues in the high beam circuit, a malfunctioning high beam relay, or problems with the body control module.

3. How can I diagnose OBDII code B3650 in a Chevrolet associated with High Beam Request Signal Circuit Performance Signal Invalid?

Diagnosis may involve checking the high beam switch for proper operation, inspecting the wiring for any damage or loose connections, testing the high beam relay, and scanning the body control module for related error codes.

4. Is it safe to drive a Chevrolet with OBDII code B3650 related to High Beam Request Signal Circuit Performance Signal Invalid?

It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to ensure proper operation of the high beam headlights, especially during nighttime driving.

5. Can I repair OBDII code B3650 in a Chevrolet indicating High Beam Request Signal Circuit Performance Signal Invalid myself?

Depending on your experience and knowledge, you may be able to address the issue yourself by checking the high beam switch, inspecting the wiring, and testing the high beam relay. If in doubt, it's advisable to seek professional assistance.

6. Are there any quick tips to fix OBDII code B3650 in a Chevrolet associated with High Beam Request Signal Circuit Performance Signal Invalid?

Quick tips include checking and replacing any blown fuses related to the high beams, ensuring the high beam switch is functioning correctly, and inspecting the wiring harness for any visible damage.

7. Will resetting the OBDII system clear the B3650 code in a Chevrolet linked to High Beam Request Signal Circuit Performance Signal Invalid?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing the High Beam Request Signal Circuit Performance Signal Invalid is not addressed, the code is likely to reappear.

8. How much can I expect to pay to repair OBDII code B3650 in a Chevrolet related to High Beam Request Signal Circuit Performance Signal Invalid?

The cost of repair can vary depending on the specific cause of the issue. It's recommended to consult with a mechanic or dealership for a more accurate estimate based on your vehicle's condition.

9. Is OBDII code B3650 in a Chevrolet indicating High Beam Request Signal Circuit Performance Signal Invalid a common problem?

While it may not be as common as some other OBDII codes, issues related to the High Beam Request Signal Circuit can occur in Chevrolet vehicles, especially in older models or those with high mileage.

10. How long does it typically take to repair OBDII code B3650 in a Chevrolet associated with High Beam Request Signal Circuit Performance Signal Invalid?

The repair time can vary based on the exact cause of the issue and the availability of parts. Simple fixes like replacing a fuse or a switch can be done quickly, while more complex wiring or module repairs may take longer.