Mercury Relay Harness 10-Pin
$44.17
Genuine Mercury 10-pin relay harness designed for Mercury and MerCruiser electrical systems. Provides reliable OEM-quality wiring connections for relay-controlled circuits and accessory installations.
Compatible With:
- Mercury SmartCraft Systems
- Mercury FourStroke Outboards
- Mercury Verado Outboards
- Mercury Pro XS Outboards
- Mercury SeaPro Outboards
- MerCruiser Sterndrive Applications
- MerCruiser Inboard Applications
- Mercury Rigging & Accessory Installations
- Mercury Relay-Controlled Electrical Systems
Supersedes:
- 888429K02 → 888429K12
The Mercury Marine 888429K12 Relay Harness 10-Pin is a genuine Mercury OEM electrical harness designed to provide a reliable connection between relay-controlled circuits and Mercury engine electrical systems. This harness is commonly used in accessory power, engine control and SmartCraft-related installations where a dedicated relay connection is required.
Manufactured to Mercury Marine specifications, the harness features marine-grade wiring, sealed connectors and durable insulation designed to withstand vibration, moisture, heat and the harsh marine environment. Genuine Mercury wiring harnesses ensure reliable electrical performance, correct fitment and long-term durability.
The 10-pin configuration allows seamless integration into compatible Mercury and MerCruiser electrical systems, reducing installation time while maintaining OEM wiring integrity. It is commonly used during engine rigging, electrical repairs, accessory installations and replacement of damaged harnesses. The harness is supplied as a complete assembly ready for installation.
Using genuine Mercury electrical components helps maintain system reliability, reduces the risk of wiring faults and ensures compatibility with Mercury’s engine management and accessory systems.
