Mercury - Helm Harness Dual Engine Next Gen DTS Helm Harness 84-8M0157213. OverviewThis harness handles the main communication path for a dual-engine, single-helm DTS setup. It keeps things simple by giving the helm one clean route into the system instead of stacking extra wiring behind the dash. The layout ends up easier to follow and a lot less cramped, especially on boats where space behind the helm disappears fast. It's the kind of harness that makes the whole system feel steadier and more p