Circuit/System Verification
WARNING: This page is about a different car, the 2008 Isuzu i-370, 2008 Isuzu i-290, 2008 GMC Canyon, and 2008 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
Ignition ON, command the headlamps on and off with a scan tool and verify that the headlamps turn on and off.
- If the headlamps do not turn on or remain always on perform the Headlamp Relay Control Circuit Test.