Mercury - Key Switch Harness Kit Non-DTS 14-Pin Ignition Wiring Kit 896537K15. The Mercury Key Switch Harness Kit (Non-DTS 14-Pin) is designed for mechanical outboard installations that require additional reach at the helm without transitioning to digital throttle and shift systems. It is commonly used on larger or deeper console layouts, center consoles, and refit projects where standard harness lengths are not sufficient. The extended harness length allows for cleaner routing and helps reduce