Mercury – CAN Data Harness (10-Pin, No Resistors) | 20-Foot SmartCraft Lead | 84-879969T20

Overview

Long SmartCraft runs on bigger boats need room to breathe, and this harness delivers it. The Mercury 84-879969T20 CAN Data Harness adds twenty feet of non-terminated SmartCraft cable, giving you the reach to route the data line cleanly through consoles, bulkheads, and deep rigging channels. It carries CAN P, CAN X, and CAN H signals through the standard yellow 10-pin plug, making it a reliable choice for systems that already have proper termination in place.

Key Features

• 20-Foot Extension – Designed for long-distance SmartCraft routing on larger boats.
• Yellow 10-Pin SmartCraft Plug – Standard connector carrying CAN P, CAN X, and CAN H.
• No Built-In Resistors – Intended for networks where termination is installed elsewhere.
• Full CAN Channel Support – Passes all SmartCraft communication lines cleanly and consistently.
• Multi-Bus Ready – Supports SmartCraft CAN P, X, and H system layouts.
• OEM-Grade Build – Factory connectors and shielding ensure a secure, stable connection.

Compatibility

• SmartCraft CAN P networks
• SmartCraft CAN X networks
• SmartCraft CAN H networks
• Yellow 10-pin SmartCraft connection points

Performance & Practical Benefits

This harness makes long SmartCraft runs easier to manage by giving you the extra length needed for clean, natural routing. It prevents overstretched cables, reduces sharp bends, and makes it easier to pass through busy console spaces or long rigging channels. Once connected, the CAN signals remain steady, keeping SmartCraft modules and helm devices communicating the way they should.

Why Buy OEM

SmartCraft communication relies on the right shielding, pin alignment, and connector quality. Mercury’s OEM harness delivers all three, preventing the signal noise and intermittent behavior that cheaper aftermarket cables can cause. The factory build stands up well to vibration, moisture, and the everyday movement of a boat on the water.

FAQ

Q1: When does the 20-foot extension make sense?
When the standard SmartCraft harness can’t reach between modules or across a long helm layout.

Q2: Does this harness include resistors?
No. It’s a non-terminated harness for systems with termination located elsewhere.

Q3: Will this affect SmartCraft readings or performance?
No. It simply extends CAN P, X, and H communication lines.

Q4: Can it be used on DTS systems?
Yes—if the system uses the yellow 10-pin SmartCraft layout and proper termination is already installed.

Q5: Is installation straightforward?
Yes. It plugs inline with OEM connectors and routes like any standard SmartCraft cable.