As long as you have a 7-way at the rear of your motorhome that has active turn signal/stoplight circuits and has a 12 volt accessory circuit as well the part # TK94FR will work regardless of the brake setup of the motorhome.
The Prodigy RF brake controller # TK94FR has a 300 foot range so the 40 foot you listed would not be a problem.
I attached an install video for this controller for you to check out as well. view full answer...
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