Headlamp Ballast Replacement (TT6, TT7, TT8)

Fig 1: Identifying Headlamp Ballast (TT6, TT7, TT8)

Courtesy of GENERAL MOTORS COMPANY

Callout	Component Name
WARNING: 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. WARNING: The high intensity discharge system produces high voltage and current. In order to reduce the risk of severe shocks and burns, the battery negative cable must be disconnected any time service work is being performed on or around the high intensity discharge system. Preliminary Procedure Remove the headlamp capsule. Refer to Headlamp Capsule Replacement (TT6, TT7, TT8) .
1	Headlamp Ballast Screw (Qty: 3) TIP: Hand tighten the ballast screws.
2	Headlamp Ballast TIP: Ensure the ballast seal is properly seated onto the ballast prior to installing the ballast to the headlamp capsule.