Originally Posted by bozlouie
I may have to contact the previous owner for this as it was a comment on their original add [sic]. “‘Wireless brakes”
Chances are it is an AuTowBrake or Tekonsha unit mounted on the trailer. Chances are you will need (or very much should have), a tow vehicle connection with four wires for the lights
and one more for the trailer brake power. But thats at the minimum (and without a charge line for the trailer battery). The 7-pin connector is the standard, even if you don't use all 7 wires. So in 99% of cases you would still want a 7-pin on your tow vehicle even with "wireless" brakes.
If its the Curt "wireless" controller then it requires a 7-pin on the tug. It just plugs into the 7-way connector, and can be removed just as fast and easy (even by a thief).