Understanding
Trailer Brake Controllers
by: Derek Chastain
An electric trailer brake controller is a device that supplies power from a tow
vehicle to a trailer's electric brakes. There are two types of brake controllers
on the market today - Time Delay Activated and Inertia Activated.
While the controllers operate differently, they are very similar. Both types have
the same wiring configuration. Both allow the driver to adjust the amount of braking
power and both have a pressure sensitive manual override switch that can be used
to apply the trailer brakes independently of the tow vehicle.
Time Delay Activated Brake Controls
Time Delay Activated or "solid state" controllers are enabled by the
depressing of the brake pedal in the tow vehicle. Once enabled, time delay activated
controllers apply a gradual voltage to the trailer's brakes using a Time Delay
Circuit.
The advantages of a solid state brake control unit are the inexpensive cost, low
profile, and they can be mounted at any angle. The disadvantages mostly pertain
to Hazard Flashers issues. In most applications the digital display will flash
with the hazard flashers and if the gain is set aggressively, some pulsing of
the trailer brakes may be felt.
Hazard Flasher issues can be resolved by using a Pulse Preventer that will isolate
the brake control from the vehicles flashers, thus eliminating the pulsing.
Inertia Activated Brake Controls
Inertia Activated Brake Controllers or Pendulum Style controllers are enabled
by the depressing of the brake pedal and activated by a Pendulum Circuit that
senses the stopping motion of the vehicle. The Pendulum Circuit applies a proportional
voltage to the trailer's brakes.
When the Inertia activated brake control is properly adjusted, the trailer will
decelerate at the same speed as the towing vehicle. A result of this is increased
braking efficiency and reduced wear on the brakes.
Advantages of pendulum style controllers are efficient braking under a variety
of braking conditions including adverse conditions. They also have a smooth braking
motion.
Pendulum style controllers have a few disadvantages also. They tend to be larger
than solid state controller. They usually more expensive and they must be mounted
in a level position. Tekonsha's Prodigy controller is an exception. Due to its
innovative technology, it can be mounted in almost any position.
Whether the brake control is Timer Activated or Inertia Activated, the gain can
be adjusted by the user. Both feature a pressure sensitive switch that can be
used to apply the trailer brakes independent of the tow vehicle. Most importantly,
both styles achieve the same goal safely and reliably. Visit http://www.trailerbrakecontrols.com
for more information.
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