Mercury - DTS AGI Harness (No J-Box) SmartCraft Gauge Link 892486K08. OverviewThis DTS AGI harness ties SmartCraft-style analog gauges straight into the PCM on engines that don't use a junction box. It uses the 10-pin tach link to pull clean data for tach, trim, fuel level, block temp, and oil pressure/level. On the water, it keeps those readings stable and protects the PCM with built-in transient-voltage suppression. It's a tidy way to get the essentials on your dash with a direct-to-PCM hookup