1971 mustang wiring harness | eBay Find great deals on eBay for 1971 mustang wiring harness. Shop with confidence. Skip to main content. eBay Logo: 1971-73 Ford Mustang Classic Update Wiring Harness Complete Kit 510662 See more like this. 1971-73 Ford Mustang Original A/C and Heater Blower Motor Wiring Harness . 1971 Mustang Parts - Mustang Wiring Harnesses Mustang Wiring Harnesses - Electrical Wiring Harness - Dallas Mustang - Order Mustang Parts Online!, The 1971 Mustang offered the big block 429. The Mustang Grande hardtop with vinyl, the Mustang Mach 1 and the Mustang BOSS 351 were also available.