Ford E-350 Econoline Wiring Harness | Auto Parts Warehouse We've got a wide rang of top-quality Ford E-350 Econoline Wiring Harness of all the best brands in the industry at an affordable rate. All of our Wiring Harnesss are guaranteed to fit if you use enter your Ford E-350 Econoline into your Year Make Model selector. ford e350 wiring harness | eBay Find great deals on eBay for ford e350 wiring harness. Shop with confidence. Skip to main content. eBay Logo: Curt 56020 Custom Wiring Harness for Ford E-150/E-250/E-350 Super Duty (Fits: Ford E-350 Super Duty) 60 Day Returns. Ships same day if ordered before 2pm CT. Brand New.