Harness Electronically Commutated MotorCaracteristicas: It is installed to the bike's wiring harness at the 36 pin ECM connector (connection requires harness plug disassembly; two terminated wires are inserted into two unused ports in the 36 pin connector, and a ground wire added) Handy for motorcycle models with tight clearances around the ECM such as Dyna, Softail Rocker and 02 05 V Rod models Requires ThunderMax ECM with serial number 114000 or higher (produced beginning August 2008)