Mercury – DTS AGI Harness (No J-Box) | SmartCraft Gauge Link | 892486K08

Overview
This 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.

Key Features
    • 10-Pin PCM Tach Link – Sends key gauge data straight from the PCM.
    • Multi-Gauge Support – Tach, trim, fuel level, block temp, and oil pressure/level.
    • No J-Box Needed – Direct interface for simplified DTS setups.
    • Voltage Suppression – Built-in transient protection for PCM circuits.
    • OEM DTS Layout – Matches Mercury’s wiring pattern for supported PCMs.

Engine & Boat Compatibility
    • PCM0309
    • PCM0702
    • PCM0802
    • PCM8002

Performance & Practical Benefits
This harness keeps gauge signals clean, cutting out the flicker and dropouts that show up with tired wiring or improvised adapters. It simplifies DTS gauge installations by removing the need for a junction box, which makes the rigging path shorter and easier to follow. Once installed, the gauges typically respond faster and hold steadier because the signal comes straight from the PCM.

Why Buy OEM
OEM DTS wiring is built to Mercury’s specs, so the PCM sees the right loads and the gauges get the right signals. The connectors fit tight, the shielding works, and the suppression hardware is already built in. Most boaters prefer OEM for PCM-linked harnesses because the wrong wiring can cause all sorts of strange gauge behavior.

FAQ
1. How do I know if this harness is the right one?
If your DTS engine uses a 10-pin PCM tach link and no junction box, this is the correct harness.

2. What happens when a harness like this goes bad?
You’ll see jumpy or missing readings on multiple gauges, not just one.

3. Does this support analog gauges?
Yes—this harness feeds analog-style SmartCraft link gauges.

4. Is installation complicated?
Not usually—plug into the PCM, route it cleanly, and connect the gauges.

5. Does the suppression hardware matter?
Yes—it protects the PCM from voltage spikes and keeps the signals clean.