LarryB's P-Pump Fuel Solenoid Wiring Harness for Flat Pin Solenoids, Includes Relay, Link Great for Engine Conversions Easily Connect your shutdown solenoid correctly 4 connections are required. 1. Ground, 2. 12v+ 50amp minimum (battery or alt), 3. Run, 4. Start. Includes SS70A 70amp relay and fusible link blue wire