Do Trailer Brake Assemblies Have a Power and Ground Wire

Question

Question:

How do you hook up a sign electric brakes to the trailer the axle came in where the green and brown wires connected and I have a single white wire how do I connect them to make them work and how do I know if they work In the beginning I had a double axle electric break now Im going to one break system

asked by: James F

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Expert Reply:

Trailer brakes use a magnet for activation that is not polarity sensitive. That means that either wire can be used as the power or the ground as long as the other is the opposite. I'd check to see where all three of your wires run on your trailer to verify what's going on. It could be that the two wire that are spliced together are for the positive of one brake assembly and then the positive to run over to the other side of the trailer and the white is ground, but you'll have to check more as the wire colors don't always match what they should.

expert reply by: Jameson C

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Answer 1

To wire your electric brakes you will want to run 10 gauge wire #10-1-1 to one of the brakes and run it to the other brake, using butt connectors like #05732-2 to connect them. The grounds will not be spliced, each brake assembly should have its own…

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Answer 2

First, put the magnet ground wires nearby the magnets on the trailer frame. Running them far away makes it harder for the system to complete the circuit. You mentioned that power is getting to the magnets but how much power? TO determine that you can…

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Answer 3

It sounds like you have a wishbone wiring harness install on your trailer. A regular 4-way wiring harness has 4 wires from the back of the connector, 1 for left turn/brake typically (yellow), 1 for the right turn/brake typically (green), 1 for the…

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Answer 4

Its not uncommon for there to be slight voltage drop off over a certain distance but with the brake controller set to the maximum you should still be getting 12 volts at the brake magnets. We need to determine if the low voltage is coming from the…

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Answer 5

I have an answer for you. There are many different 5-lug bolt patterns for trailer wheels. For example, there are 5 on 4-1/2, 5 on 4-3/4, 5 on 5, and 5 on 5-1/2. The 5 on 4-1/2 is the most common pattern. In order to know for sure what bolt pattern…

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Answer 6

Typically trailers will carry more of their weight on the front of the trailer, so you would want to put the brakes on the front axle as it will most likely carry more weight while braking. Also, when braking, weight will shift forward from the…

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Answer 7

Most likely the lift kit you need is the part #K71-707-02 that you referenced which fits number 10 TorFlex axles like we are almost certain you have but I recommend finding the label on the axle which has the capacity/info listed and verifying that…

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Answer 8

Since we know your 2003 Trail-Lite has a Dexter torsion axle with a 2,800 lb capacity the correct lift kit is the part #K71-707-02. This will give you a lift of 2-5/8 inches.

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Answer 9

The "Trailer Disconnected" error message on the dash with a factory brake controller is usually related to an issue with the blue brake output wire that runs from the brake controller to the 7-Way connector. The fact that the issue remains…

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Answer 10

Yes the wishbone style 4-ways like part #A35W42B are perfectly compatible with 4-ways on vehicles that only have a single wire for the running light circuit. This is very common and wouldn't be an issue at all.

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Answer 11

If your current brake assemblies are self-adjusting, once the hub/drum is removed you will be able to see the adjuster cable extending across the brake assembly as shown in the photo I have edited for you. If you find you do not have them, you can…

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Answer 12

You can use the Curt T-Connector 4-Pole wiring harness #C55384 plugged in at the back of your existing factory connector to provide a 4-pole plug for your lighted hitch cover. This harness connects inline between the existing connector and the…

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Do Trailer Brake Assemblies Have a Power and Ground Wire

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