Infiniti FX35 Trailer Wiring | etrailer Trailer Wiring Harness Installation - 2004 Infiniti FX35. Speaker 1: Today on our 2004 Infiniti FX35, we're going to be taking a look at showing you how to install the Tekonsha ZCI circuit protected vehicle wiring harness with four pole flat trailer connector and insulation kit, part number 119250KIT, this is what our four pole looks like when it's installed. Infiniti FX35 Trailer Wire Harness and Connector - Best Order Infiniti FX35 Trailer Wire Harness and Connector online today. Free Same Day Store Pickup. Check out free battery charging and engine diagnostic testing while you are in store.