What Type of Signal Does a Trailer Brake Controller Generate

Question

Question:

Does the trailer brake controller output a DC voltage that goes from low to high as more braking power is needed? Or does the controller generate a PWM signal to vary the effective voltage to the brake magnets? We have so many trailers that often have problems, and I want to build a light/brake tester box.

asked by: Mister B

0

Expert Reply:

Trailer brake controllers such as the excellent Prodigy series, models P2 # 90885 and P3 # 90195, generate a varying DC output voltage depending on the power/boost setting on the controller.

If set at full power such units will generate a bit over 12 volts to the brake magnets; lower power settings will deliver reduced voltage to the brake magnets and deliver lower braking pressure.

You may find the linked articles on trailer brake controllers to be of interest.

expert reply by: Adam R

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Answer 1

Trailer brake controllers like the Prodigy P2 #90885 use a 4-wire hook up. The wire functions and connections are as follows: BLACK wire carries 12V power and connects to the vehicle + battery post through a 20- or 30-amp circuit breaker like…

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Answer 2

Your brake controller should be getting 12 volts of power going into the brake controller. The wire that feeds power to the brake controller is the Black wire. You can test this wire by using a multimeter part #PT89ZR. The amount of power coming out…

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Answer 3

What type of brake controller do you have? Is it a proportional or time delayed? Also, are you using the brake pedal or the manual override? If you have a proportional brake controller and you are using the manual override then you should see a full…

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Answer 4

The manual override switch is used to operate the trailer brakes independently of the tow vehicle brakes. This feature is primarily used in the initial set-up of the controller, but the manual switch can be used anytime a gentle brake input is…

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Answer 5

Since the braking power is still hydraulic, you should have no issues converting from a vacuum over hydraulic system to an electric over hydraulic system. The electric over hydraulic actuator will take the place of the vacuum that pressurized the…

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Answer 6

Here is what you will want to do. Since your 12 volt accessory circuit is only rated for 20 amps you are going to want to run a 10 gauge wire like the part #10-1-1 (sold by the foot) from the positive battery post of your vehicle through a 40 amp…

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Answer 7

On your 2002 Ford F-250 you will need to connect the Red wire to the Black wire on the brake controller for +12 Volts power and the Light Green wire to the Red Stoplight wire on the brake controller. The Dark Blue wire is connected to the Blue wire…

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Answer 8

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 9

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 10

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 11

It sounds like you are speaking of the wires for the brake magnets. If this is correct, you will need to connect one of the wires to the brake controller output wire on your trailer connector and the other wire will need to be grounded to a clean…

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Answer 12

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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What Type of Signal Does a Trailer Brake Controller Generate

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