Headlight Door System: Description

NOTE: Headlight Doors Module (HDM) may also be referred to as headlight opening door actuator control module.

Headlight doors are actuated by reversible electric motors mounted near each headlight door. Battery voltage is applied at all times to Headlight Doors Module (HDM). Module also supplies output voltage to door motors.

Depending on model and headlight switch position (or daytime running lights module, if equipped), battery voltage is applied to HDM to activate HDM. See WIRING DIAGRAMS .

Based on voltage inputs from headlight switch, HDM directs voltage to headlight door motors to actuate headlight doors. To reverse motor direction, HDM reverses circuit polarity. HDM determines when doors are fully open, closed or jammed, and turns off power to motors to prevent overload.