B0508

Short To Voltage Or BCM Open Internally In The LH DRL Relay Control Circuit

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Left DRLs don't work
Left DRL flashing
The malfunction indicator on the dashboard lights up

Causes

Short circuit to voltage in the DRL relay control circuit
Internal break in BKU
Wiring harness damage
DRL relay malfunction
Contact corrosion

How to Fix

Check the integrity of the wiring harness
Check the condition of the DRL relay
Check the operation of the BKU
Replace damaged components
Clean contacts from corrosion

Related codes

B0507 B0509 B0510