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Home >> Oldsmobile >> 1990 >> Toronado Base, 4T60/ME9 >> Repair and Diagnosis >> Body & Frame >> Headlight Doors - Automatic >> Testing >> System Check >> With Twilight Sentinel

With Twilight Sentinel

  1. Turn ignition switch to RUN position. With light switch in OFF position and twilight sentinel control in ON position, cover twilight sentinel photocell. The headlights should light and headlight doors should open. With both the light switch and twilight sentinel control in OFF position, headlight doors should close.
  2. With the light switch in PARK position, and twilight sentinel control in ON position, cover the twilight sentinel photocell; the Body Computer Module (BCM) will open the headlight doors. When the photocell is uncovered, the headlight doors will not close until the light switch is in OFF position.
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