How to Find Cold Side of the Brake Switch To Install the Roadmaster EvenBrake

Question

Question:

I am installing a roadmaster 9400 even break system on a 2018 GMC Acadia my question is wiring it to the brake light. What color is the wire and do you have a diagram?

asked by: Gunny

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Expert Reply:

There is not a color wire that you'd need to look out for since it could change from vehicle to vehicle, but you're going to need to look for the wire that shows power ONLY when the brake pedal is pressed - you'll need a circuit tester # PTW2993 to find this wire.

This is the cold side of the switch which will need to be connected to the #1 terminal on the ICX transmitter of the Roadmaster Even Brake # RM-9400.

expert reply by: Bryce D

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Answer 1

Your 2018 GMC Acadia actually has blunt cut wires for you to splice in a brake controller like the Tekonsha Prodigy P3 #90195. The last Acadia to use the Adapter #3026-P that you referenced was the 2017 Limited which was the same as the 2016 model…

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Answer 2

So the red wire of your brake controller needs to be connected to a circuit of your 2018 GMC Acadia that sees voltage only when the brakes are applied. If you used a custom install harness on your Acadia like the #3026-P to install the controller…

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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

The main difference between the Curt Trailer Hitch Receiver part #C13416 and the EcoHitch Hidden Trailer Hitch Receiver part #EH97FR is that the EcoHitch has a completely hidden cross tube whereas the Curt cross tube will be visible from the rear of…

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Answer 6

Hi David! There are quite a few hitches offered for your 2026 Honda Odyssey, so I definitely understand wanting to know the differences. There are basically three styles available for you and I have them broken out below: Exposed Crosstube: etrailer…

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Answer 7

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 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

No, it will not Bryan. The Redarc Tow-Pro Link item #RED57AR requires a USCAR port that comes with factory tow packages. The Stealth Hitches Hidden Trailer Hitch Receiver w/ Towing Kit item #SH25VR, that fits your 2023 BMW X5, does not have this…

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How to Find Cold Side of the Brake Switch To Install the Roadmaster EvenBrake

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