1970 mustang wiring harness | eBay www›Search›1970 mustang wiring harnessFind great deals on eBay for 1970 mustang wiring harness. Shop with confidence. Skip to main content. eBay Logo: American Auto Wire 1970 Ford Mustang Wiring Harness Kit # 510243 See more like this. 1969-1970 Ford Mustang Taillight Wiring Harness . Pre-Owned. $52. From Canada. or Best Offer. 1970 Mustang Wiring Harness | eBay 1970 Ford Mustang. Classic Update Wiring Harness Kit. The early GM/FORD generators and externally regulated alternators are just not up to the task of providing power to an expanded wiring system like..