AutoCodes – GMC – B0507 GMC

B0507 GMC Code - Open Or Short To Ground 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: B0507 GMC indicates Open Or Short To Ground 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.

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Code Popularity 1,219

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
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Code B0507 GMC 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 B0507 GMC - Open Or Short To Ground In The LH DRL Relay Control Circuit - AutoCodes.com — B0507 GMC Code - Open Or Short To Ground In The LH DRL Relay Control Circuit

What does this mean?

What are the Possible Causes of the DTC B0507 GMC?

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 B0507 GMC?

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 B0507 GMC 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.

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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 B0507 GMC Code

1. What are the common symptoms of OBDII code B0507 GMC related to the LH DRL relay control circuit?

- The common symptoms include daytime running lights (DRL) not functioning properly, flickering DRL lights, or complete DRL failure on the left-hand side of the vehicle.

2. What can cause the OBDII code B0507 GMC indicating an open or short to ground in the LH DRL relay control circuit?

- The code can be triggered by a faulty DRL relay, damaged wiring in the LH DRL circuit, or a poor connection in the DRL system.

3. How can I diagnose the LH DRL relay control circuit issue causing OBDII code B0507 GMC?

- You can diagnose the problem by checking the LH DRL relay for proper functionality, inspecting the wiring for any damage or corrosion, and testing the connections in the DRL circuit.

4. What are some repair tips for fixing the open or short to ground in the LH DRL relay control circuit?

- Repair tips include replacing the LH DRL relay if it is faulty, repairing or replacing damaged wiring, and ensuring all connections in the DRL circuit are secure and free of corrosion.

5. Can I drive my vehicle with OBDII code B0507 GMC active?

- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to avoid potential safety hazards or further damage to the DRL system.

6. How do I reset the OBDII code B0507 GMC after repairing the LH DRL relay control circuit issue?

- You can reset the code using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes to clear the error code from the system.

7. Are there any preventive measures to avoid encountering code B0507 GMC in the future?

- Regularly inspecting the DRL system, ensuring proper maintenance of the vehicle's electrical components, and addressing any DRL-related issues promptly can help prevent code B0507 from reoccurring.

8. Can a DIY enthusiast repair the LH DRL relay control circuit issue causing code B0507 GMC?

- Depending on the level of expertise, a DIY enthusiast can attempt to diagnose and repair the LH DRL relay control circuit issue, but it is recommended to seek professional help if unsure.

9. Will fixing the LH DRL relay control circuit issue improve the overall performance of my vehicle?

- Fixing the LH DRL relay control circuit issue will restore proper functioning of the DRL system, ensuring better visibility and safety while driving, especially during daytime.

10. How long does it typically take to repair the LH DRL relay control circuit issue triggering code B0507 GMC?

- The repair time can vary depending on the extent of the issue, but it usually takes between 1 to 3 hours to diagnose, repair, and reset the LH DRL relay control circuit problem.