Trailer Brake Magnets Won't Activate With Proper Voltage To Them

Question

Question:

voltage at cable joining to magnets 11.5V, individual magnet amp test 3.35, resistance test 3.5 ohms, brake controller set at max 13.0V. Brakes adjusted correctly. Any theories as to why the magnets are not actuating brake lever, there is the typical humming/buzzing when brakes applied indicating I would assume the magnet coils are energised, All mechanicals appear to be in good working order. Any suggestions would be much appreciated.

asked by: Maurice D

0

Expert Reply:

It sounds like you have power to the magnets which is a good start. You want to make sure the ground wire from the brake assembly or brake magnet has a good connection to a clean, bare metal surface on the trailer frame or ground to the trailer's main ground.

It is also a good idea to check to make sure there are not any visible signs of wear or damage on the magnets. I would check the grounds though because it sounds like your issue considering you have power to the magnets and you can hear the humming sound when they are activated.

expert reply by: Heather A

0

Answer 1

All of our 12 x 2-inch 6K-rated electric trailer brakes are shown on the linked page. Most of these use the 5-bolt mounting pattern but a few Dexter products include holes for BOTH bolt patterns, both 5-bolt and the 4-bolt Hayes/AL-KO pattern,…

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Answer 2

In regards to the Dexter Electric Trailer Brake Assembly, left side part #23-105 is for driver and right side part #23-106 is for passenger. These are typically used on trailer's with a 6 lug bolt pattern, 3" diameter axle beam,…

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Answer 3

The center hole in the Dexter Electric Brake Assembly for 4 Bolt or 5 Bolt Flange, 12 inch, Left Hand, 6,000 lbs Axle #23-105-09 measures 3-1/4 inches in diameter. This is the same on the right hand brake assembly, part #23-106-09.

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Answer 4

The 4-bolt brake mounting pattern is fairly rare in a 12 x 2 inch assembly. We have some options though; for 6K axles we have #23-105-09 for the left and #23-106-09 for the right. The 4-bolt pattern on these assemblies is offset meaning the bottom…

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Answer 5

It should be getting close to 12 volts if the power output is set to the maximum on the brake controller. Some brake controllers will not work properly if they are titled or turned to the side or if it has a leveler knob that is not level. Check…

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Answer 6

The issue is that the gauge wire you have for the brake output circuit is too thin. You need to be using 10 gauge wire like part #10-1-1 (sold by foot) to deliver the needed amperage and voltage for the brakes to apply. They should easily lock up…

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Answer 7

It depends on what the brake controller output is set to. If you have the brake controller set to the maximum then there should be about 12 volts at the brake magnets. To see if the brake magnets are drawing the correct power set the brake controller…

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Answer 8

Other than both brake assemblies being a 12x2 inch for a 6K axle, there are several differences between the two brake assemblies. Brake assemblies are either right or left side of the trailer specific. The #23-458 is for the left side of a trailer…

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Answer 9

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 10

If your current springs have 5 leaves then going to a 7 leaf spring will increase the height of the trailer a little and make the trailer more susceptible to sway. Regarding capacity if you go with springs rated higher than what is required it will…

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Answer 11

The 40 amp fuse for your 2006 Chevrolet Silverado tow package is used for the 12 volt battery charge circuit. This fuse is located toward the front of the underhood fuse box closest to the front auxiliary positive post (see photo). There may be a…

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Answer 12

On a 2005 Chevy Silverado 1500, If you are facing the front of the truck looking at the power distribution box, there will be a post at the back left side and a fuse slot near it. It is that fuse slot that you will install a 30 amp fuse. I have…

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Trailer Brake Magnets Won't Activate With Proper Voltage To Them

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