Amazon: honda element trailer wiring harness Amazon: honda element trailer wiring harness. CURT 55336 Vehicle-Side Custom 4-Pin Trailer Wiring Harness for Select Honda, Acura, Isuzu Vehicles. 4.6 out of 5 stars 367. $18 $ 18. 55 $39 $ 39. 69. FREE Shipping on orders over $25 shipped by Amazon. In stock on June 13, 2019. Honda Element Trailer Wiring | etrailer Trailer Wiring Harness Installation - 2008 Honda Element. Today on our 2008 Honda Element we're going to be installing the Tow Ready T1 vehicle wiring harness with a 4-pole flat trailer connector, part number 118465. Now this particular wiring kit is a two part kit. This right here is the half that goes up underneath the driver side dash.