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Trailer Brake Module
(Optional) The trailer brake module controls the braking functions of a trailer equipped with electric
brakes. There have been many styles of brake modules used. All of the brake modules that have
been used function the same. However, the location of the manual adjustment controls may vary.
The brake module will be located under the dash tray to the left of the steering column. It has a
red indicator light (LED), a Thumb wheel braking force adjustor, a Pendulum level adjustment
lever, and a Manual Braking lever.
As the vehicle slows during braking, the brake module sends a signal to the trailer energizing
the trailer brakes. This signal is proportional depending on how fast the vehicle is stopping.
1. This adjustment must be done with the trailer disconnected from the vehicle.
2. Stop the vehicle on a level surface but do not release the brake pedal.
3. Adjust the thumb wheel to its minimum position downward towards the bottom of the module
case.
4. Pull the pendulum towards the front of the module case. The LED should be at it's maximum
intensity.
5. Slowly push the pendulum towards the rear of the module case and stop when the LED just
reaches its minimum intensity. The pendulum should be very close to vertical.
6. Repeat the previous two steps a few times to be sure that the pendulum is at the correct
position.
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LED: The LED's brightness is related to the braking force
at the trailer, dim with little or no signal to bright at maximum
braking force. Once the vehicles has stopped, the LED will
remain at it's dimmest intensity as long as the brake pedal is
depressed.
Thumb Wheel: The thumb wheel is used to adjust how much
braking force is sent to the trailer brakes. Rotate the thumb
wheel upward towards the top of the housing to increase the
braking force.
Pendulum Lever: The brake sensor inside the module must
be level for it to function correctly. The pendulum lever is used
to level the internal brake sensor. Perform the following steps
to adjust the sensor:
Manual Braking Lever: The manual braking lever can be used
to manually apply the trailer brakes. Slide the lever to the left to
apply the brakes. The braking force is proportional depending on
how far the lever is moved.
MB-280-02
Operator Manual
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