1968 Mustang Wiring Diagrams : Evolving Software 1968 Mustang Restoration; 1968 Mustang Wiring Diagrams. Created this diagram from bits and pieces hidden all around the internet so I thought I’d republish it here all in one place. Download PDF. 1968 Master Wiring Diagram . E20 – NEUTRAL SWITCH . E19 – CONVENIENCE SYSTEMS . 1968 Ford Mustang Parts | Electrical and Wiring | Wiring and Classic Industries offers a wide selection of 1968 Ford Mustang parts, including 1968 Ford Mustang interior parts and soft trim, 1968 Ford Mustang exterior sheet metal, 1968 Ford Mustang moldings, 1968 Ford Mustang emblems, 1968 Ford Mustang weatherstrip and unique accessories, to nearly every nut and bolt needed for installationlaying 121-128 of 128 Products.