Plug And Play H4 LED Headlight Wiring Harness Kit With Negative Switched Conversion And Fused Protection Universal H4 High Low Beam Relay Harness For 9003 5x7 7x6 4x6 Sealed Beam Heads
✔️ Universal H4 dual-beam relay kit with positive-switched conversion
This plug-and-play wiring kit converts a negative-ground headlight system to positive-switched operation, making LED headlight upgrades simple. It supports 9003, H4, and common sealed-beam sockets like 7x6, 5x7, and 4x6, so it fits a wide range of trucks, SUVs, and older cars.
✅ Compatible with 7x6/5x7 H6024 and 4x6 sealed-beam sockets✅ Two high-temp relays for reliable high/low beam switching
✅ High-temp ceramic sockets and heat-resistant polycarbonate loom
✅ No stock-wiring cutting; installable in minutes and reversible
💡 What is an H4 headlight relay harness used for in LED conversions? This handy device helps convert a negative-switched headlight system to a positive-switched setup, enabling LED headlight kits to work reliably across many vehicles. - Handy for upgrading headlights on trucks, SUVs, and older cars - Keeps stock wiring intact with fused protection - Quick, reversible installation that doesn’t modify the factory harness - Improves beam performance without permanent wiring changes