Imagine what would happen if you were to raise the
frame of the vehicle, or if the wheel attached to
the suspension arm were to move downward. Vehicle
height would raise and the sensors would compress.
This would cause the car to think it was high and
therefore vent air from the bags making the car sit
lower. The reason the rear is different is because
it is a different sensor. When I designed a modified
height sensor system, I noticed that the front
sensors needed additional voltage to cause a bleed
signal while the rear needed a reduction in voltage.
They work differently.
WARNING: Performing this
modification could emphasize existing defects of the bag
and cause one or more bags to leak.
1) Turn air-ride switch OFF, loosen lugnuts, place
vehicle on jack stands and remove both front wheels.
2) Locate the mounting bracket and dislodge the sensor
from it's mounting stud. There is a small metal tab that
must be pulled, which allows you to dislodge the ball
from its mount. Measure the amount of travel required to
compress it completely and make a note. You can simply
eyeball it if you wish.
3) Drill a hole in the bracket directly below the top
mounting bolt. This hole should measure the same
distance that was required for the sensor to compress.
You can do this while the bracket is attached to the
vehicle. NOTE: You are drilling a hole through the
bracket only, not through the bracket and into the
vehicle. Also, make sure the bolt will fit through the
hole that you drilled.
4) Loosen the bracket and reattach it by placing one of
the bolts through the hole that you just drilled, and
into the top mounting hole in the vehicle. You have
essentially moved the bracket up.
5) By turning the bracket left or right, you have a
small amount of adjustment to make up for any
6) That's it. Let the car down, turn the air-ride switch
ON, start the car and let it level, then turn the car
off to see the results. It should drop down approx.
another 1" or so, depending on where your sensor was
located to start with. It could be as much as 2.5"-3.0"
inches on some vehicles.
1) Turn off air-ride switch, and back the
car onto a set of ramps.
2) Locate the rear sensor upper mounting
bracket and remove the attaching bolts. Rear
sensor mounting brackets differ. There may
be one or two bolts attaching the bracket.
There should be a long slot in the bracket
where you can slide the bracket up and down
(see picture). I
have been told that some models do not have
3) Remove the sensor by pressing the release
clip. Reposition the upper bracket so that
it sits higher, tighten the bolts, then
reattach the sensor. WHEN THE SENSOR IS
REMOUNTED, IT WILL BE EXTENDED. Since you
will be back under the car again to make
adjustments, just attach one bolt snugly.
Make a note of how much you moved the
sensor. It should be almost directly
proportionate to the amount of drop.
4) Drive the car off the ramps. Turn the air
ride switch on, then restart the vehicle.
Make a note of where the settles. If it is
too low, you must move the mounting bracket
lower, COMPRESSING THE SENSOR. If it is too
high, reposition the bracket higher,
EXTENDING THE SENSOR.
5) Repeat until you arrive at the desired
For questions or comments about this modification,
send me an
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