CUSTOM DESIGN: Tekonsha T-One T-Connector hitch wiring harness kits are designed to fit each make and model vehicle based on manufacturer specifications. Each trailer wire harness has an industry standard 4-Way vehicle side plug end. EASY INSTALLATION: No cutting or splicing required! Tekonsha Tow Harnesses are a DIYers dream. Easy to install, and easy to use. Follow the detailed vehicle specific instructions. SUPERIOR FUNCTIONALITY: This trailer hitch wiring harness features solid, weather-proof construction that is designed to withstand the elements and stand the test of time. OPTIMIZED CIRCUIT CAPACITY: This Tekonsha wiring harness kit has a stop/turn capacity of 2.1 amps and a taillight capacity of 5.6 amps. VEHICLE APPLICATION: 2010-2021 Lexus RX350, 2018-2021 Lexus RX350L, 2010-2021 Lexus RX450h.