Low Beams (Envoy and Diamond Edition W/HID)

CAUTION: The high intensity discharge system produces high voltage and current. To reduce the risk of severe shocks and burns:
- Never open the high intensity discharge system ballast or the arc tube assembly starter.
- Never probe between the high intensity discharge system ballast output connector and the arc tube assembly.

The battery fuse supplies the following to the low beam relay located in the underhood fuse block:
- Battery voltage
- 175 A of current potential

The current is provided through the low beam relay contacts to each HID ballast when the relay is energized. The low beam relay is controlled by a battery positive voltage input from one of the following components:
- The headlamp switch in the HEAD position
- The Body Control Module (BCM) when the headlamp switch is in the AUTO position

G102 provides ground for the low beam relay. When the headlamps are turned on, either from the headlamp switch or the BCM, the following actions occur:
- The relay contacts close.
- Battery positive voltage is supplied to the RH LOW and LH LOW fuses in the underhood fuse block to each HID ballast.
The LH headlamp ballast ground is at G109 while the RH headlamp ballast ground is at G113.