Identifying Correct Motorhome Brake Wire To Tie Into Indicator Light For Roadmaster InvisiBrake
Updated 02/17/2026 | Published 06/18/2024
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Question:
i am installing the new InvisiBrake system and need to figure out which wire on the brake control harness in the motorhome should be connected to the Motorhome monitor LED 300065-00. There are 5 wires, colored as follows: - Brown - Illumination - Dark Blue - Trailer electric brake feed - Red - Trailer brake control feed - White - Ground - LT Green - Stop Lamp Feed to Brake Control i believe i need to connect to the White and LT Green, but want to make sure
asked by: John J
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Expert Reply:
As long as you do not have a brake controller in your motorhome you will be able to use the dark blue - trailer electric brake feed to carry the power from the motorhomes 7-way to the Braking Indicator Light # RM-300065-00. If you do have a trailer brake controller you will need to use the additional wiring included with the Roadmaster InvisiBrake # RM-8700 to have a dedicated circuit.
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Heather A.
2/17/2026
Hey, how did the wiring for your InvisiBrake system turn out using the dark blue trailer brake feed? Your results could really help others trying to connect the monitor light in a similar setup.