A headlight leveling system adjusts the vertical aim of the headlights based on the position of the rear suspension. As you load the trunk of a car, bed of a truck, etc. the suspension is compressed to allow the vehicle to ride smoothly. This causes traditional headlights to aim higher. A headlight leveling system lowers the headlight beam to compensate for this allowing the driver to see the road clearly without blinding oncoming traffic.
I have a 2001 RX300 with high intesity discharge headlights. My headlight leveling warning light comes on occasionally also. The system responds to lights coming the other direction and height of the ground in front of you. If there is a street light or the road goes up or down a hill, the system may get confused. If you have an older model like mine, dont worry about it. If your car is newer you may want to take it to the dealer.
De-leveling the System - 2012 was released on: USA: November 2012
An automatic leveling system is a suspension system which automatically adjusts front and rear ride heights to compensate for changes in axle load.
More than likely you have an air leak in the airride shock system. It means that the air compressor is running excessively.
It could have load leveling shocks in the rear.
2018 suberban
To turn off the leveling light on a Cadillac Catera, first, check the vehicle’s air suspension system for any issues, such as leaks or faulty sensors. If everything appears normal, you may need to reset the system by disconnecting the battery for a few minutes and then reconnecting it. If the light persists, a diagnostic scan may be necessary to identify any underlying faults. Consult the vehicle’s manual or a professional mechanic for further assistance if needed.
Cef
There are many reasons why the leveling system will quit working. The first thing to check would be the brake interlock wires, one may have come loose.
On my 05 Prius the problem was the axle height sensor located near the left rear wheel.
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The 2004 dodge ram has a system built into the Power Distribution Modual (fuse box under hood), that turns on the head lights when the head light switch fails. This is a safety system in case the switch fail at night. Check and replace head light switch.