Mercury - CAN Data Harness (10-Pin, Dual Resistors, Non-DTS) 30-Foot SmartCraft Lead 84-879982T30. Overview. Large boats and long rigging paths often need a SmartCraft harness that can handle both distance and termination without extra parts. The Mercury 84-879982T30 CAN Data Harness does exactly that. With thirty feet of reach and two built-in termination resistors, it forms a complete CAN P backbone in a single run. It also includes dedicated leads for the horn and Link Gauge, keeping the wiri