【Why you need the H4 relay harness？】-If you suffer from problems on your headlight, such as dim headlights.malfunctioning headlights, especially for 7x6/5x7/6054/ LED headlights on Toyota Tacoma and Pickup series, this 2-headlight h4 headlight relay canperfectly fix and your 7x6/6054 led headlights will be much brighter. 【High Quality 】-These harely headlight wirings are composed of two high-temperature ceramic sockets, heat-resistant polycarbonate wires and durable relays, which can increase the brightness of your headlights by 30%-50%, giving you a brighter and safer night driving experience. 【Fitment】-H4 Relay Harness compatible with Toyota, Jeep Pickup, Tacoma, Subaru, Mitsubishi, or Suzuki 5X7 led headlight . H6054 H5054 H6054LL 6014 6052 6053 7X6 led headlights vehicles etc. 【Easy to install】-Just plug and play! Less cost, better quality, only need 10~15 minutes to complete the installation, get brighter light！ Note: Only two headlamps can be paired with one set of wires. 【BEST REPLACEMENT PROMISE】-Do not fit for your vehicle=Return the harness；Defective harness=get new；Any problem with our products, JUST FIND ORDERS DETAILS AND REACH OUT TO SELLER, WE CAN FIX THAT!