Hiya, you don't mention what model you have, you may want to add it to your signature. I, too, would like to know the answer. I suggest you call Thor Customer Service, don't bother with email. Have the last 8 digits of your VIN ready. Ask the rep if they can explain it (please share back to the forum) and ask them to send you any and all pertinent construction drawings and wiring schematics (PDFs). But ask for the plumbing diagrams too. I just looked at the drawings I have but I don't see a harness to the tow receptacle, sorry. Good luck.
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I'm wearing trifocals now but my hindsight is 20/20.
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Bilsteins and Sumos front and rear...HUGE! FatMat and Hoodliner...HUGE!
Hellwig sway bars F&R, 235/85 Hankook ATM, alignment...HUGE!!!
Battery watering, 260watts Solar and BigFeets to make life easier.
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