Electric Trailer Brake Controller For a 2018 International LT 625 With Air Brakes

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Question:

Id like to add an electric brake controller to a 2018 International LT 625 with air brakes. Any advice?

asked by: Mark T

0

Expert Reply:

You are going to want to use the Hayes Air Actuated Trailer Brake Controller # HA100400C on your 2018 International LT625. With this brake controller it will tie into your existing air lines for your brakes and use the pressure in the air lines to proportionally match the braking force applied to the electric trailer brakes.

The only connections you will need to make are for the Air Line # RM450700, and electrical connections. The white wire from the Hayes controller will go to a 12 volt ground, the black wire to a 30 Amp Circuit Breaker # PK54530 connected to a 12 volt positive source and the blue wire to your trailer connector for the electric brakes. The red wire is not required as the air line will provide the input to the controller to tell the trailer when it needs to brake.

I have linked the instructions below that you can reference for additional information.

expert reply by: Bud M

0

Walt

7/5/2025

I own a 2016 international durastar with Air brakes... im wanting to install electric trailer brakes for my 3 axle trailer. Looking for everything needed a to install Thx walt

Kate F.

7/7/2025

@Walt I am happy to get the parts you need to install electric brakes on a 3 axle trailer. What is your axle capacity, bolt pattern, and bearing numbers? Once I get that information I can get a list sent your way.

Kwajaleon

6/1/2026

Hello sir, I have a 2019 single axle daycab and I want to pull my gooseneck trailer that has electric brakes could you tell me or send me the items I would need to make this work

Answer 1

The trailer brakes work on a separate circuit than the lights. You have a couple of options to control the electric brakes on the trailer. One option is to use an air over electric brake control, #HA100400C. This unit connects to the air brakes on…

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Answer 2

Both will work Jim. We don't carry the Hayes Brake Controller HA100400C anymore. You can install any proportional/inertia type brake controller so long as you have a stop light circuit that's 12 volts on your semi. This will be a wire coming…

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Answer 3

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 4

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 5

It sounds like you are speaking of the wires for the brake magnets. If this is correct, you will need to connect one of the wires to the brake controller output wire on your trailer connector and the other wire will need to be grounded to a clean…

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Answer 6

Both the Roadmaster and Blue Ox tow bars are great options. But if it was my decision to make I would go with the Blue Ox Avail part #BX7420 as we have found that the Blue Ox tow bars are a little easier to connect and disconnect from. Also this tow…

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Answer 7

Yes, it will work. You'll just need to cut the Lance 6-pin connector out and rewire it into the etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector item #e99011. Here are the individual functions of that Lance 6-pin:…

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Answer 8

That's a very good question, we tend to be extra cautious and say to use 10 gauge wire because that would be more than enough. When you get into longer trailers that will end up using a lot of wire the heavier gauge wire becomes more necessary.…

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Answer 9

Since wire color codes are NOT universal, we always recommend wiring by function, rather than wire color. If you look at the Trailer Wiring FAQ article I have linked you to, you can see some diagrams showing the proper way to wire a vehicle and…

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Answer 10

Actually, the P3 now has the upgraded axis accelerometer like the P2. The Tekonsha P3 Trailer Brake Controller #90195, will work with both electric over hydraulic brakes on the trailer as well as electric brakes. It has a menu option on the display…

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Answer 11

If you just need a 4-pin to 7-pin trailer wiring adapter, then you can use part #C57672. This will plug into the 4-pin trailer connector on your brother's vehicle and give him the 7-pin socket for the trailer. Keep in mind, this will only give…

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Electric Trailer Brake Controller For a 2018 International LT 625 With Air Brakes

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