Trailer Brakes


Trailer Brakes is a brake controller is usually considered as an installed module or device or OEM.  It is fixed to the tow vehicles on the driver’s side dashboard region and connects the electrical braking system of the trailer. The connection is in proportion to the brake engagement when coming to a halt or slowing down. A trailer brake controller is not required with a TSB (Trailer Surge Braking) system if not using modern electric instead of Hydraulic devices. The trailer brakes are either electric-hydraulic brake actuators or electric friction brakes.

Generally, the brake controllers will have a -/+ expand/gain adjustments.  The operator of the tow vehicle will set the gain as elevated as possible, without locking up the trailer brakes and made a few test stops.  The gain adjustment depends on the weight of the trailer, and hence less possibility of wheel lockup

A large range of trailers will have trailer brakes, for instance, horse trailers, larger boat trailers, enclosed trailers, enclosed utility trailers, travel trailer like car carriers, longer and smaller tent trailers.  It is important to remember that if the trailer weight is about a couple thousand pounds, then trailer must have some braking system, and the tow vehicle must have a brake controller.

Types of Trailer Brakes:

You can find various types of trailer brake controllers that are available on the market. boat trailers for sale Auckland
Air-actuated electric brake controller: It uses the air-pressure brake structure on a tow truck with air brakes and runs through current to control the trailer’s electric brakes.

Hydraulic over an electric controller: This brake controller uses the hydraulic pressure brake system on a vehicle that contains hydraulic brakes and gives a current to regulate the trailer’s electric brake system. Some vehicle manufacturers like Ford prefers OEM

PMPP (Pedal-mounted pad proportional) controller:  A sensor is fixed separately on the brake pedal to attach the controller.

PBC (Proportional Brake Controller): Senses slow down the vehicle using a pendulum or same type of device to pertain a proper current for trailer braking.

Surge brake: The trailer shoves against the actuator when the tow vehicle slows down as it applies force to its main cylinder and the hydraulic pressured in transmitted to the brakes.

Time-delayed brake controller:  It applies the brake current with an access over time to a particular level set by the trailer operator.

Testing TBM (Trailer Brake Magnets) for Proper Function:


You have to perform four different tests to check the brake magnets on the trailer. You should do the first test to use a multimeter and check the trailer braking system amperage. The brake magnet in the trailer will show amperage from the brake controller located on the output voltage propelled by the brake controller.  Doing this brake magnet test allows you to understand if the magnets are working properly or if it needs any further test.

If further testing is needed, then you can test the each brake magnets for suitable amperage. Test every magnet for a while and test the resistance of magnets. Also, perform other tests if needed.