Engine-Codes - Generic - B0507

B0507 - Open Or Short To Ground In The LH DRL Relay Control Circuit

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

B0507 Possible Causes

  • 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 is the B0507 code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

What is the cost to diagnose the B0507 code

Labor: 1.0

The cost to diagnose the B0507 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
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Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

B0507 Meaning

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.

More Information

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Information for specific makes

  • B0507 BUICK Open Or Short To Ground In The LH DRL Relay Control Circuit
  • B0507 CADILLAC Open Or Short To Ground In The LH DRL Relay Control Circuit
  • B0507 CHEVROLET Open Or Short To Ground In The LH DRL Relay Control Circuit
  • B0507 GMC Open Or Short To Ground In The LH DRL Relay Control Circuit

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