Identifying Correct Motorhome Brake Wire To Tie Into Indicator Light For Roadmaster InvisiBrake

Question

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

0

Trailer Brake Controller Wiring On RV Motorhome
(click to enlarge)

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.

expert reply by: Bud M

0

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.

Answer 1

The Roadmaster InvisiBrake Supplemental Braking System #RM-8700 can be spliced into trailer lighting harness before the diodes. Before meaning the wiring between the 4-pole connector and the diode. After being the wiring between the diode and the…

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Answer 2

For starters, there is no bridge between the toad and the tow vehicle for the Roadmaster Brake-Lite Relay Kit for Towed Vehicles part #RM-88400. This gets installed solely on the toad. In regards to the Hopkins Custom Tail Light Wiring Kit for Towed…

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Answer 3

Per the manufacturer the Roadmaster InvisiBrake Supplemental Braking System #RM-8700 is fully compatible with the Mopar 82215382AB wiring harness. The wiring harness allows the Jeeps taillights to operate in conjunction with the motorhome's…

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Answer 4

No, you will not need a brake light relay in order to install the Roadmaster Invisibrake #RM-8700 on your 2014 Jeep Wrangler. You will however, need a Stop Light Switch #RM-751452. The stop light switch kit is a requirement for proper usage of the…

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Answer 5

I attached an install video that shows the Invisibrake part #RM-8700 in a similar 2013 Jeep Wrangler as yours. The install is pretty involved but if you follow the install instructions link and video I attached you will be walked through the entire…

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Answer 6

The Hopkins wiring harness #HM56200 has diodes that protect the car but will not prevent back feeding to the InvisBrake, #RM-8700. To use the Hopkins harness and InvisiBrake together you would have to install 3 additional diodes, #RM-690, on the…

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Answer 7

Tow bars don't last forever unfortunately. If yours has had 20 years of constant use it would be time to replace the whole thing. Roadmaster typically recommends their tow bars get replaced at 8-10 years and a max of 80k miles. The Roadmaster…

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Answer 8

In order to replace the Advent Analog Wall Thermostat ACTH11 you'll need the Air Distribution Box w/ Wall-Mounted Thermostat for Advent Air RV Air Conditioners part #ACRG15. This is a digital style replacement which is what you'll need since…

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Answer 9

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 10

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 11

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 12

Hey Andrew! Yes, Furrion does have a Chill Cube model with a heat pump. This was actually just released for aftermarket sale. You will need a complete system to make the switch, new R32 units aren't backwards compatible with old R410A systems.…

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Identifying Correct Motorhome Brake Wire To Tie Into Indicator Light For Roadmaster InvisiBrake

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