Mercury - Ignition Harness Non-DTS 14-Pin Engine Ignition and Gauge Wiring 84-896537T02. The Mercury Non-DTS Ignition Harness is designed for mechanical control setups where clean ignition and gauge wiring is essential. It connects the engine, ignition switch, and gauge circuits without the complexity of digital throttle and shift systems. This harness is commonly used during repowers or when replacing older wiring that has become brittle or unreliable, helping keep mechanical systems straightfo