How To Tell The Difference From Right and Left Electric Brake Assemblies

Question

Question:

To determine Right and Left break assembly orientation is the trailer viewed from front or back? Thanks for your service.

asked by: Chuck M

0

Expert Reply:

The right and left orientation is determined if you are standing behind the trailer looking towards the tow vehicle. The left side is the drivers side and the right side is the passengers side.

Tthe shorter brake pad will always be in the front of the assembly and the longer brake pad on the rear of the assembly, the reason is that the shorter pad will contact the drum first to slow the trailer down and the larger pad will then contact the drum to finish stopping the trailer, so both pads will wear evenly.

I am including a video link that will describe the position of the trailer brake assembly.

expert reply by: Jeff D

0

click to enlarge

Jennifer P.

7/3/2025

Hi. My trailer brake is flashing I have a short. I just did new brakes on the trailer and it seemed pretty standard. Left side has 3!wires right side has 2. Dumb question - left side - all three wires get wired together right -3 from the trailer to 2 in the brake? Thanks.

Reply

Jon G.

7/3/2025

@JenniferP Not a dumb question - trailer wiring can definitely be confusing if you're new to it. I have a few starter questions for you to check into but also let me know if you've already done these: 1. Did you connect the wires per function? Trailer wire colors aren't always reliable so it's always best to make sure the functions match. 2. Are all of your wiring connections still solid? Sometimes when replacing things that connect to wiring it's easy to either not clamp something all the way down, or forget to clamp something all the way down. 3. Do you have a strong ground connection both for your brakes and for the controller? A weak ground connection or even one that has some corrosion can throw the "short" code as well. Check on all that and if you're still having issues, let me know and I can help you get this figured out!

Reply

Answer 1

The left side is the driver side, right side is passenger side. On a trailer brake assembly like #23-105 the arm that the magnet is on points to the front of the trailer and the magnet always will be on the bottom. I have included a picture that…

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Answer 2

If you look at the backs of the brake assemblies there should be a hole where the magnet wires come out and a little opaque plastic strap. So if you are looking at the back of the assembly and those items are on the left then it is the left side…

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Answer 3

Hi Trip; it looks like you ended up replacing the pair with #K23-478-479 which was the right choice. Unfortunately, brands don't cross over with these 4,400 lb axles so Lippert isn't an option. The price is comparable for the pair of Lippert…

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Answer 4

Hey Elias, thanks for reaching out! We have the parts #290-991 and #290-992 that you referenced, but the 290-993 for 2.72" OD Hubs was actually discontinued back in 2023 which is why you are having a hard time finding it. You can use a rubber…

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Answer 5

We have an adjustable ball mount for you. First, though, the BulletProof Adjustable Ball Mount that you referenced, part #HD258, has only an 8" drop. Unfortunately, that is not enough for your lowest trailer. The top of your receiver to the…

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Answer 6

To determine the size of the brake assemblies you need you have to measure the depth and width of the hub drum on the axle like what you see in the picture I attached. The most common size is 2-1/4 inch wide like the #T4071600-500 that you…

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Answer 7

Hello Kevin, thanks for reaching out. Yes, those parts will be interchangeable. Both the Lippert #LC46WD and the Dexter are the #K23-478-479 10" x 2-1/4" brake shoes and the same 4-bolt backing plate. If you are looking to replace your…

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Answer 8

The inner bearings should be #LM48548 (1.375 inch inner diameter), outer bearing should be #L44649 (1.06 inch inner diameter) and the grease seal should be #58846. I would recommend you pull your bearings out to verify that but that SHOULD be what…

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Answer 9

Electric brakes have 2 wires located at the back. One is for power and the other is for ground (it doesn't matter which is used for which function). The ground wires should be connected to the trailer frame. The only other place that would carry…

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Answer 10

You will need to measure the diameter of the spindles where the seal and bearings ride. Check out the picture I attached that shows where this is. You will need an exact measurement so either a digital or dial caliper will be needed. To pick out the…

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Answer 11

Based on the information you provided either the Titan Hydraulic Brake Kit - Free Backing - 10" - Left and Right Hand Assemblies - 3,750 lbs #T4071600-500 or #T4423500-400 will fit your drums. The only difference between these two brakes is the…

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Answer 12

Yes, the Electric Trailer Brake Kit - Self-Adjusting #AKEBRK-35-SA that you referenced are an exact replacement for the AxleTek assemblies you have now that have Axletek-10-GG stamped on them. If you check out the attached picture you can see the…

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How To Tell The Difference From Right and Left Electric Brake Assemblies

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