Troubleshooting Trailer Brake Magnets that Have Voltage to Them But Arent Activating

Question

Question:

we cut and separated each wheel magnet wire at backing plate. with good 12.9 volt battery directly connected to magnet, brakes do not engage on any of the 4 wheels. do not get a ohm or amp reading on any of the magnets when hooked to battery for testing. i have no way of pulling rims but it does not seem likely that all 4 magnets went bad at the same time. really need help thanks

asked by: Barry J

0

Expert Reply:

It has to be the ground then of the brake magnets. If they are all getting voltage and not applying the problem is the grounds. Make sure the magnets are connected to a clean portion of the trailer frame or you can run ground wires from each magnet back to the main ground of the trailer wiring harness. When the magnets are activating you should hear them click as they grab the drum and you'll also hear a low hum too.

expert reply by: Jameson C

0

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Answer 1

The magnets of a brake assembly do not actually give the brakes more or less power. You want to use the correct magnets for the assemblies you have on your trailer. Going with a magnet for a higher rated assembly will simply make the brake activation…

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Answer 2

There are a number of reasons why the brakes on your trailer may not be working. Lets start with the easiest things to check. First, check the vehicle and trailer connectors for corrosion. This can cause a short inside the connector and the brake…

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Answer 3

You should be able to ground the brake magnets to the frame of the trailer and have them work fine. Or you can try running a jumper wire back from the ground wire of the magnet back to the main ground of the trailer frame. If you are getting 12 volts…

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Answer 4

Sounds like there could be a short in your trailer wiring for one of the brakes or there could have been a mechanical failure in that one brake assembly. The second possibility is more likely since only one brake was affected. First inspect the…

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Answer 5

To connect a 7-way to a 12 volt battery all you would need to do is run a length of 10 gauge wire like #10-1-1 (sold by the foot), from the 12 volt accessory post of the 7-way (the 2:00 position), to the positive terminal of the battery. If you have…

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Answer 6

It is possible you need new brakes, but not necessarily. The brakes locking up when in reverse is usually because the brakes have recently been installed and they were installed backwards. Brakes are specific to either the left or right side. If…

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Answer 7

As long as one of the wires coming from the back of the hub is a ground and the other is a power, it does not matter which wire on the magnet goes to which wire from the back of the hub. I have included a link to a video of a magnetic brake…

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Answer 8

We have the part #BP01-110 which is the correct replacement magnet kit for AL KO 3,500 lb brake assemblies like you have.

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Answer 9

Hubs that will fit those bearings include etrailer Trailer Hub and Drum Assembly for 3,500-lb E-Z Lube Axles 5 on 4-1/2 #AKHD-545-35-EZ-K or Trailer Hub and Drum Assembly 6 on 5-1/2 #AKHD-655-35-EZ-K depending on the bolt pattern you have. The brake…

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Answer 10

For your flat bed trailer, I recommend using 12 gauge wire like #12-1-1 at the minimum, but preferably 10 gauge wire like #10-1-1. Both of these wires are sold by the foot, so you can order the exact length you are needing. If you were to use a…

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Answer 11

If you are not getting power to the 12 volt pin on the 7-way on your 2018 Ram 2500, the most likely issue is that you have a blown fuse. I took a look at the online version of the owner's manual and it looks like it is in the F30 cavity in the…

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Answer 12

I do have a solution for you but unfortunately, I don't have information as to the location of the blue brake output signal wire on a 2002 GMC 6500. I called a very popular trailer brake controller manufacturer Tekonsha, and they were also not…

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Troubleshooting Trailer Brake Magnets that Have Voltage to Them But Arent Activating

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