Mercury - DTS Command Module Harness (Shadow Mode Triple) Command Module Wiring 84-896377T02. OverviewThis harness connects the command module into a triple-engine DTS setup running Shadow Mode. It's the updated replacement for 84-896377A01, so it drops right into rigs using 2007-and-newer Gen I DTS engines. The wiring run ends up cleaner and steadier, which helps Shadow Mode feel smooth instead of touchy. It's a quick swap that keeps the control system behaving the way it should.. Key Features