If you are checking with the engine off, you will find that it is probably only hot when the engine is running...that is if we are talking about a factory installed tow package. The 7 way plug is a "RV plug" and is designed to keep the trailer batteries charged while towing, that would include the house batteries on a travel trailer and the breakaway battery on a car trailer.
1986 Dodge Ramcharger 440 2wd, Bracket Racer Under Construction 1998 Ram 2500 QuadCab, new daily driver. 2008 Honda Element 2014 Carry-On 7x14 Cargo Trailer
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