Parts Needed to Add Electric Brakes to a Utility Trailer with a 3500 Lbs Axle and Brake Flanges

Question

Question:

The trailer is a 2004 Carry- On from Lowes. It has no brakes. The axle is a single Dexter 3,500 lbs and has a brake mounting flange with 4 holes. The wheel bolt pattern is 5 on 4-1/2 2-5/8 apart. The tow vehicle is a 1999 Toyota Tacoma 4X4 extended cab 6 cylinder. What are the all components needed to add Electric brakes?

asked by: George W

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Expert Reply:

You will need several items to add electric brakes to your Carry-On Utility trailer. Starting with the trailer you will need a hub and drum that matches the bearings and seal on your trailer spindle and your wheel bolt pattern. The only way to be sure is to check the bearing part numbers and seal part number, but with a 3,500 lbs Dexter axle that has brake mounting flanges you will most likely have the # L44649 Outer and # L68149 inner bearings and # 58846 seal. If these are the correct bearing and seal part numbers, the # 84546UC3 Hub & Drum Assembly will be correct for your spindle and 5 on 4-1/2 inch bolt pattern.

You will then need 10 x 2-1/4 inch brake assemblies and I recommend Electric Trailer Brake Kit # AKEBRK-35 which included both left and right and assemblies. These brake assemblies will bolt directly to the 4 bolt brake mounting flanges on your axles.

To finish the trailer you will need wiring and a 7-Way connector. 10 gauge wire, # 10-2-1 is recommended and you will attach one wire from the brake magnet to the white wire for ground and the other to the black wire for power from the 7-Way connector. The 7-Way Round RV Style Trailer Side Connector, # A7WCB will then need to be wired at the front of the trailer. We have an article that details wiring this connector for you to review, see link.

We have a video installation showing installation of trailer brakes on a single axle trailer that should be a great resource for you, see link.

Now we have to get your 1999 Toyota Tacoma ready to connect to the 7-Way trailer connector and to activate the trailer brakes. You will need a brake controller and a wiring kit to complete the installation,

The Prodigy P2 Brake Controller, # 90885, would be a good choice for your truck and trailer. This is a proportional controller that activates the trailer brakes in unison with the speed in which the vehicle is stopping. For Wiring the Brake Controller 7 & 4 Way Installation Kit, # ETBC7, will complete the setup as long as your Tacoma has a working 4-Way connector at the rear of the vehicle. We have detailed instructions for installation of this kit for you to use online, and a video installation that should prove helpful, see links.

If your truck does not have a working 4-Way connector you will also need the T-One Vehicle Wiring Harness, # 118379. I have linked installation instructions and a video for this harness also.

These parts should complete your setup for the trailer and your truck.

expert reply by: Robert G

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Answer 1

If a brake line is opened on a braking system is common practice and recommended to bleed the entire system. There's a high possibility air entered the system when the line was opened.

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Answer 2

When installing the Titan Zinc-Plated Brake Actuator - Drum - Multi-Fit Ball - Bolt On - 7,000 lbs #T43397007K you need to leave the brass fitting that is on the end. This is the orifice connector which ensures proper fluid flow characteristics so it…

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Answer 3

The 4-bolt mounting pattern of 7-inch brakes is the same as for 10-inch brakes; both use bolts/holes spaced apart by 2-7/8-inches on center. Moving to larger brakes will naturally require new hubs and these new hubs must use the same set of bearings…

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Answer 4

In my online research, I was unable to find any reference to a Dexter J12-863. According to my contact at Redline, the #54-80-4 would be the correct replacement wheel cylinder for a 7 inch Dexter right hand brake assembly.

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Answer 5

For the LCI52-SB-86.5-68.5, the two ending measurements are: 1st - measurement from hub to hub, meaning the length of the axle in this case is 86.5 inches. 2nd - spring seat dimension where they're welded, meaning the spring seats are 68.5 inches…

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Answer 6

We have exactly what you need for a pre-greased hub and drum for your Lippert 3,500 lb axle. The correct part number is the following: - Easy Grease Trailer Hub and Drum Assembly for 3.5K Axles - 10" - 5 on 4-1/2 - Pre-Greased #AKHD-545-35-EZ-K…

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Answer 7

You would gain extra stopping assistance by adding brakes to your second axle on your tandem axle trailer. This will also help keep your original set of brakes from wearing down as quickly since wear and tear will be placed on the brakes for both…

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Answer 8

A 2,000 lb trailer axle like the Dexter Trailer Axle Beam part #T20BTR-7258 is not going to come equipped from the manufacturer with a brake mounting flange because of the weight of the trailer it is designed to be used on. However, most qualified…

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Answer 9

There are a few ways to find the right system for your trailer. The easiest is to look on the trailer axle for a sticker or plate that says what the capacity is. Then you can measure your brake drum to find the right size. I have attached a photo of…

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Answer 10

Congrats on your new trailer. To add a brake controller to your 2010 Toyota Tacoma, I highly recommend the Redarc Tow-Pro Liberty Brake Controller item #RED52VR. This is a proportional brake controller that will engage your trailer's brakes when…

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Answer 11

Electric brakes do not each have to be changed in pairs, so that would not be the cause of the error message. I am not sure what brake controller you have, but there is some troubleshooting you can do. You will need to find out if the issue is on the…

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Answer 12

You are correct about needing to have a brake mounting flange like #4-34 welded on correctly. Because it needs to be just right it should be installed by a qualified professional in a shop that works on trailers. We do not have specific instructions…

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Parts Needed to Add Electric Brakes to a Utility Trailer with a 3500 Lbs Axle and Brake Flanges

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