Not sure I understand about placement of your vent. But I'll use our 283ts as an example.
In front area I have 2 openings. Forward is a powered vent. Next is the air conditioner. Then there is a powered vent in bathroom. Last, in bedroom there is a powered vent.
If you are referring to a simple crank open non powered vent, but there are wires tucked up under the shrowd, than it is most likely pre wired for a powered vent. That it is a closed loop simply means you would have to cut the wires and wire your powered vent in, the fan switch completing the circuit.
As for the colors of the wire, don't remember mine being purple. Usually you'll find black/white or red/white.
If your unsure, try to contact Forrest River. Or. a simple circuit tester with a sharp probe will tell you if, or which wire is "hot".
Was reading an old post of yours regarding the wiring for a ceiling vent fan and have a question. I know the response you received was that it was one-sided in a loop from fridge to rear to front. I have a 2004 Lexington with the power vent in rear bedroom and want to add one to the vent (non-powered) in the living/kitchen area. Now for the question. When I remove the schroud from the vent there are wires on both sides with no visual break. They are white and purple and seem to be of larger gauge then the regular black and white to and from the lights and such. Do you remember what your wires looked like? Thanks in advance,
Ps, they are not so large as to be an AC 110 line
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