MeyerPlows - Meyer Plow Main Wiring Harnesses Info Meyer Plow Main Harness Wiring Pin Outs. These are the "1 Piece Plug" and Universal Wiring Harnesses. The 1 Piece Plug made its debut with the MDII Mount. The MDII made it necessary to unplug EACH plow light, the 3 individual Coil wires, and the Motor Harness to remove the complete plow assembly. Meyer came out with the 1 Piece Plug. Meyer Pump Wiring - Smith Brothers Plow Parts Genuine Meyer PLOW Side plug and wiring harness 22262 for MD II and EZ Plus mounting with E-47, E-57, or E-60 pumps. It has a power, dual ground wire for the E-60, single wire Coil connections Red, Green, Black, 2 Nite Saber plugs. $185 $170. Manufacturer: Genuine Meyer.