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Hensley Hitch

BETTER BRAKING
by Ron Estrada
Hensley Manufacturing

"What happens in those precious few seconds from the moment the driver pounces on the brake pedal to the sigh of relief at the end..."

Part 1 - STOPPING IS NOT OPTIONAL

Part 2 - THE BRAKE CONTROLLER

Brake controllers have gone from a simple timing device to pendulums to the modern accelerometer driven devices most of us use today. The overriding theory has always been that you want your trailer brakes to engage at precisely, or slightly ahead, of the tow-vehicle's brakes. Of course, no one has invented a brake controller that can read minds (yet), so every manufacturer has had to fall back on the one common event that occurs every time a tow vehicle's brakes are applied: illumination of the brake lights.

Your car or truck's brake light comes on the moment the brake pedal is pushed, slightly before any brake pressure is actually applied. Brake control manufacturers take advantage of this by tapping into that circuit (called the "Brake Light Wire" by most) and sending a small amount of power to the trailer brakes the moment it's detected. That's how your trailer stops "ahead" of the tow vehicle.

After that, the brake controller sends a greater or lesser amount of power to the trailer brakes, depending on the input from the accelerometer, cable to the brake, hydraulic pressure, or pendulum position, depending on which type of brake controller you have.

Call Hensley Mfg. at 800-410-6580 or visit their website at www.hensleymfg.com 
and get a free video

 

  What do you think? - add your comments here

Readers' comments:
Latest first

Coby H :   This is a great series of articles. Thanks.

Romney K :   I believed that the best solution was electric/hydraulic but the low cost way is the way to go. I've used Hensley for years and always been happy but I wondered if there was something better at a higher cost. I think not after reading these articles. Many thanks

TPK :   I always thought that the controller needed to respond to the brake system in order to get the timing right between the puller and pusher. I think I understand it better now but I still don't understand the proportional braking problem. I have a 2006 Jayco with a Hensley and so far so good. I think the best way to go is a motorcoach towing a car - the big one towing the little one. If you need to get to the little one towing the big one I think you really need a Hensley. Great articles. Thanks.

 

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