Troubleshooting Electric-Over-Hydraulic Brakes On Horse Trailer

Question

Question:

Hi I Have A Forty Foot Horse traIler With Electric Over Hydraulic And I Have Prodogy Controller. 2000 Volvo Pulling It. When I Step On The Brakes You Can Here The Box On the trailer Come On but My Brakes DonT Come On. Sometimes They Work If You ManualY Pull Them. Any I deals

asked by: Sara

0

Expert Reply:

There could be any number of things causing the intermittent braking you are experiencing. I have attached a helpful article that explains troubleshooting for brake controller installations. If you have the first generation of the Prodigy, it is not compatible with electric-over-hydraulic brakes. The P2, part # 90885, or P3, part # 90195, are both compatible with EOH systems.

Since you said you can hear the box(actuator) on the trailer come on when you press the brake pedal, it sounds like you may have an actuator that is causing the problem, but to be certain you will want to check with the manufacturer of the actuator and ask about troubleshooting. Many times there is a protective shroud over the actuator and when removed, you can normally find the make and model.

You will want to check your wiring connectors to make sure there are no obvious signs of damage, or if they have become loose. Also check for any signs of corrosion and make sure the ground wires have been secured to a clean bare metal surface.

If you find you need a new actuator for your trailer and you have disc brakes, you can check out part # K71-651.

For a drum brake system, you can take a look at part # K71-650.

If you complete all of your troubleshooting and find that the brake controller needs to be replaced, I recommend the Tekonsha Prodigy P3 brake controller, part # 90195. This is one of our most popular because it is easy to install and operate.

expert reply by: Jeffrey L

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Answer 1

To bleed the brake lines on a Titan Zinc-Plated Brake Actuator #T43397007K I recommend using the Powerbuilt Brake Bleeder #ALL648591. This has a magnet that will hold the catch container where it is easily visible. Using the 4 steps detailed in the…

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Answer 2

The adjustability of the brakes of a trailer that has an electric over hydraulic brake setup is controlled by the brake controller of the tow vehicle. If your controller can't be fine-tuned enough so that you get strong braking power without…

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Answer 3

From what it sounds like, you're trying to use an OEM brake controller on a Dodge or GM to control your Dexter electric over hydraulic brake actuator. We have found that the compatibility of the OEM controllers with the electric over hydraulic…

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Answer 4

Wiring connections for the Electric Over Hydraulic Brake Actuator are as follows. Yellow - Cold side of breakaway switch, The wire that goes hot when a breakaway occurs. Black - Positive connection on breakaway switch, The wire that charges the…

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Answer 5

If your EOH brakes will not disengage the problem could either be mechanical, as in a malfunction with the master cylinder, a clog in the hydraulic lines or broken parts in the brake assemblies themselves. Or it could be electrical in origin, meaning…

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Answer 6

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 7

The Demco Hydraulic Trailer Brake Actuator part #DM72VR should be a direct replacement for the Atwood 61101 Brake Actuator that you have now. This newest updated it rated at 7K instead of 6K. This is a bolt on option that mounts on 3" centers.…

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Answer 8

To replace your NOK AD2527E seal you can use #168233. It has an inner diameter of 1.688 inches and an outer diameter of 2.332 inches. Based on what I could find on the NOK AD2527E the inner diameter is the same and the outer diameter is 2.328 inches.…

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Answer 9

If you are needing the hub and drum assembly then you will want to go with the Dexter Trailer Hub and Drum Assembly #8-201-5UC3-EZ but if you are just looking for an idler hub then you will want part #8-213-5UC1 instead. These come with the correct…

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Answer 10

The Demco Hydraulic Brake Actuator part #DM72VR is a great option to replace an Atwood 82543. That said, it does not come with any sort of reverse lockout feature therefore in order to reverse without the brakes locking up you will either need to add…

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Answer 11

It sounds like you have free backing braking assemblies on your trailer so a lockout at the trailer coupler is not needed. In order to replace the Atwood Surge Brake Actuator 82541, I recommend using the Titan Leverlock Brake Actuator part…

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Answer 12

Like you said, many factory integrated brake controllers will not work well with electric over hydraulic trailer braking systems. Some of the newer versions of these controllers now have an electric over hydraulic mode. Check to see if any of your…

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Troubleshooting Electric-Over-Hydraulic Brakes On Horse Trailer

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