Firestone 4-corner, Installation Instructions Manual

OPERATION OF THE SYSTEM

Once height programming has been completed, the system is ready for use. The height selection switch
is how you will be able to select your height. The switch has two green lenses with arrows printed on
them. This is the primary user interface of the air leveling system. If the switch is mounted correctly,
pressing up will make the height go up and pressing down will make the height go down. When a
height selection is made up or down, the lights will toggle fast during the height change. Corresponding
lights will tell you which height you are at. *

If the lights toggle slow or both of them blink slow, a fault

has occurred, see the Trouble Shooting section for a more detailed description

.

The system has four modes of operation:

Lowered Height

- Indicated by a illuminated lower switch lens

Ride Height (or standard height)

- Indicated by no illuminated switch lenses

Raised Height

- Indicated by a illuminated upper switch lens

Currently achieving Height

- Indicated by both illuminated switch lenses flashing alternately.

Lowered Height is designed to be used for show, or ease of ingress and egress from the vehicle. The
vehicle should not be driven in this mode.

Ride Height is designed to be the primary operating position of the vehicle. This mode allows maximum
up and down travel of the suspension. A full air suspension can be set flat and level. This mode offers
the best ride and handling.

Raised Height is designed to allow maximum ground clearance. This mode offers slightly reduced ride
and handling. 

Currently Achieving Height is designed to indicate when the system is actively trying to achieve your
last mode change request. This will typically occur when vehicle has first been started and on
driver selection.

Notes:

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Caution should be taken when vehicle is changing heights that the vehicle does not come in
contact with any object or person during the height change. 

>

Never have any part of your body under vehicle during height change.

>

Never lift a running vehicle by the frame without first disabling the system.

MAINTENANCE

Periodically check all parts for defects. Also check all filters to make sure they are clean and debris free.
It is wise to check reservoir for water, which indicates the air dryer may need to be changed as the
system may have a leak.

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