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How Does Brake Lite Relay Connect to ICX Transmitter of Roadmaster Even Brake  

Updated 09/08/2025 | Published 09/07/2025

Question:

I have a 2003 jeep liberty. I followed your video for my the wiring of the break lite relay. I am at the stage of wiring the ICX transmitter. Here are my questions 1. Do I tap into the green wire of the break lite relay for the green wire of the ICX transmitter? 2. I understand the white wire is a ground, and the red wire is to be attached to a fuse that is hot when the key is in the tow position, correct? So can I tap the white wire from the ICX transmitter to the white wire of the break lite relay? Can I also tap the red wire from the break lite relay to the red wire of the ICX transmitter? Thanks for your help.

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Expert Reply:

Hey Bob, I pulled up the instructions for the ICX transmitter of the Roadmaster Even Brake # RM-9400 and the Brake Lite Relay part # RM-88400 and found that you would wire the green wire with spade connector to terminal 1 on the ICX transmitter. You would not need to connect green wires between the two relays.

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Jameson C
Bob D. profile picture

Bob D.

9/8/2025

Thank you.

Jameson C. profile picture
Etrailer Expert

Jameson C.

9/8/2025

@BobD no prob!

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