Toyota FJ Cruiser Trailer Wiring | etrailer Trailer Wiring Harness Installation - 2008 Toyota FJ Cruiser. Today on our 2008 Toyota FJ Cruiser we'll be installing the Tow Ready T-One vehicle wiring harness with 4-pole flat trailer connector, part number 118405. To begin with we'll go ahead and open up the rear hatch on the FJ Cruiser. 2008 Toyota FJ Cruiser Trailer Wiring | etrailer Call 800-298-8924 to get Expert Service ordering a Trailer Wiring for your 2008 Toyota FJ Cruiser. Complete installation instructions and lifetime technical support on all Trailer Wiring purchases. Lowest price guarantee on accessories for your Toyota FJ Cruiser and the fastest shipping available.