Trailer Hitch?

[Tomline]

I have seen pots on here about installing a hitch on a Spyder RT. I notice that some installs include some type of wiring harness that in addition to the brake/running/turn signal lights has something to do with "the shifting rpm's" or something similar? Can someone explain this"Special Harness" to me? Please? TIA

[billybovine]

The trailer harness has nothing to do with shifting RPM. Some ST and RT models with the 998 engine have a trailer towing mode. You can put it into trailer mode without a trailer attached or trailer harness installed. Selectable option in the multifunction display.

[4 MARIE]

What type of POTS were they ?