AutoCodes – Chevrolet – B0508 Chevrolet

B0508 Chevrolet Code - Short To Voltage Or BCM Open Internally In The LH DRL Relay Control Circuit

Quick Answer

The Body Control Module (BCM) provides control for the LH DRL relay circuit. Common causes include Faulty Left Daylight Running Lamp (DRL) Relay, Left Daylight Running Lamp (DRL) Relay harness is open or shorted, Left Daylight Running Lamp (DRL) Relay circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B0508 Chevrolet indicates Short To Voltage Or BCM Open Internally In The LH DRL Relay Control Circuit.
Common causes: Common causes include Faulty Left Daylight Running Lamp (DRL) Relay, Left Daylight Running Lamp (DRL) Relay harness is open or shorted, Left Daylight Running Lamp (DRL) Relay circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,109

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 11, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B0508 Chevrolet Description

The Body Control Module (BCM) provides control for the LH DRL relay circuit. The BCM grounds the Left Daylight Running Lamp (DRL) relay control circuit in order to energize the LH DRL relay and turn ON the LF turn signal This allows the LF turn signal to be used for DRL and approach lighting functions. The BCM monitors the voltage level on the LH DRL relay control circuit. When the BCM commands the relay ON, the voltage level on the LH DRL relay control circuit should be low. When the relay is OFF, the voltage on the LH DRL relay control circuit should be high. If the BCM detects a voltage level other than expected, a malfunction is present and a Diagnostic Trouble Code (DTC) will set.

OBDII Code B0508 Chevrolet - Short To Voltage Or BCM Open Internally In The LH DRL Relay Control Circuit - AutoCodes.com — B0508 Chevrolet Code - Short To Voltage Or BCM Open Internally In The LH DRL Relay Control Circuit

What does this mean?

What are the Possible Causes of the DTC B0508 Chevrolet?

Faulty Left Daylight Running Lamp (DRL) Relay
Left Daylight Running Lamp (DRL) Relay harness is open or shorted
Left Daylight Running Lamp (DRL) Relay circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B0508 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 B0508 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 B0508 Chevrolet code?

Need more information on how to fix the B0508 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0508 Chevrolet 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 B0508 Chevrolet Code

1. What are common symptoms of OBDII code B0508 in a Chevrolet related to the LH DRL relay control circuit?

- Common symptoms may include the daytime running lights (DRL) not functioning properly, flickering DRL lights, or total failure of the LH DRL system.

2. What causes the OBDII code B0508 indicating a short to voltage or BCM open internally in the LH DRL relay control circuit?

- The code B0508 can be triggered by a short to voltage or an internal open circuit within the Body Control Module (BCM) affecting the LH DRL relay control circuit.

3. How can I diagnose a short to voltage or BCM open internally in the LH DRL relay control circuit in my Chevrolet?

- Diagnosing the issue involves inspecting the wiring harness for any visible damage, testing the LH DRL relay, and checking the BCM for any internal faults using a diagnostic scanner.

4. Is it safe to continue driving my Chevrolet with the OBDII code B0508 present?

- It is not recommended to drive your vehicle with the B0508 code active, as it can affect the proper functioning of the LH DRL system, potentially compromising visibility and safety.

5. Can I repair the short to voltage or BCM open internally issue in the LH DRL relay control circuit myself?

- While some DIY enthusiasts may attempt to troubleshoot and repair this issue, it is recommended to seek professional assistance, especially when dealing with complex electrical systems like the BCM.

6. Are there any temporary fixes I can try for the OBDII code B0508 in my Chevrolet?

- In some cases, resetting the BCM by disconnecting the battery for a few minutes may temporarily clear the code, but it is important to address the root cause of the issue for a permanent solution.

7. How much does it typically cost to repair the short to voltage or BCM open internally in the LH DRL relay control circuit in a Chevrolet?

- Repair costs can vary depending on the extent of the damage and whether you choose to go to a dealership or an independent mechanic, but it is advisable to budget for electrical diagnostics and potential BCM replacement.

8. Will fixing the OBDII code B0508 affecting the LH DRL relay control circuit improve my Chevrolet's overall performance?

- While resolving the B0508 code may not directly impact the performance of your vehicle, it is crucial for maintaining the proper functioning of the LH DRL system, ensuring visibility and safety on the road.

9. How long does it take to repair the short to voltage or BCM open internally issue in the LH DRL relay control circuit?

- The repair time can vary depending on the exact cause of the problem and the availability of parts, but it is advisable to consult with a professional technician for a more accurate estimate.

10. Can extreme weather conditions contribute to the occurrence of the OBDII code B0508 in a Chevrolet?

- Extreme temperatures or moisture exposure can potentially exacerbate electrical issues in the LH DRL relay control circuit, leading to the triggering of the B0508 trouble code.