duraspark wiring harness | eBay Find great deals on eBay for duraspark wiring harness. Shop with confidence. Ford Dura-Spark II, Wiring, How To - Handyman Dan This refers to the Duraspark II control module with a BLUE strain relief bushing, one 4-pin connector, and one 2-pin connector. Another version of the system has an additional 3-pin wiring connector, and two YELLOW strain relief bushing's.; Duraspark II uses a variable reluctance magnetic pickup in place of traditional breaker points.