Headlight Door Module Test

Disconnect connector C2 from the Headlight Door Module.
If headlight Doors are stuck in the open position, manually close Headlight Doors.
Using fused jumpers, jump ground to terminal D (DK GRN/WHT) and battery voltage to terminal C (GRY). See WIRING DIAGRAMS .
Do the Headlight Doors open? If the headlight Doors open, see Fig 1 . If the Headlight Doors do not open, check the wiring to the Headlight Doors Motor. If wiring is OK, replace Headlight Door Motor(s). See HEADLAMP DOOR ACTUATOR under REMOVAL & INSTALLATION.

Fig 1: Headlight Door Module Test (Table 1)

Courtesy of GENERAL MOTORS CORP.