Supersedes Technical Service Bulletin Group 94 number 12-99 dated November 30, 2012. Only vehicles with Xenon headlights can be affected by this condition. The customer complains the high beams do not function on one side or one of the low beams flickers intermittently. In addition to this, an "Adaptive Headlight Defective" warning can be present in the cluster if the vehicle has the Prestige trim level. One of the following DTCs are set in the 09 - Central Electric Control Unit or in the 55 - Headlamp Range Control Unit depending on the trim level of the vehicle. Vehicles with the Premium Plus option package can have the DTC set in the 09 module. Vehicles with the Prestige option package can have the DTC set in the 55 module. One or more of the connectors inside the headlamp housing are disconnected fully or partially from the factory.
