MeyerPlows - Meyer Plow Wiring Identification Meyer Plow Wiring Diagram Meyer Plow Controller Wiring Diagram In 2014 Meyer renamed the Drive Pro 7'-6" the "Lot Pro LD". In 2012 Meyer did come out with a 7'-6" Moldboard that fits the Drive Pro 6'-8" A Frame, and they call it the Drive Pro 7'-6" Single Pull. The Universal Harness meant that ALL current Meyer Plows used the sameMeyer Slik Stik · Meyer Touchpad Meyer Plow Main Harness Wiring Pin Outs - Meyer Snow Plow 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.