1968 mustang wiring harness | eBay Find great deals on eBay for 1968 mustang wiring harness. Shop with confidence. Skip to main content. eBay Logo: American Auto Wire 1967 1968 Ford Mustang Wiring Harness Kit # 510055 See more like this. Engine Wiring Harness Retainer Kit 1967-1968 Mustang. Brand New. 1968 Mustang Wiring Diagrams and Vacuum Schematics 1968 Mustang Wiring Diagrams and Vacuum Schematics January 29, 2015 Mustang Wiring and Vacuum Diagrams AverageJoe On this page is a list of areas covered by the 1968 Mustang wiring and vacuum diagrams; scroll down the page to see the diagram image gallery’s for both.