Circuit Description
WARNING: This page is about a different car, the 2003 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
The front axle sensor provides the headlamp leveling control modules with front axle position information. The signal circuit is shared between the two headlamp leveling control modules. The sensor is permanently grounded and has battery voltage supplied with the ignition in the ON position. The sensor arm is connected to the control arm of the front suspension. As the vehicle travels the suspension compresses and rebounds moving the front axle sensor arm. This causes the signal output of the sensor to change. The headlamp leveling control modules then compares this information with the rear axle sensor information and adjusts the headlamp leveling accordingly.