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Why to choose using Partsam H4 wiring harness? The stock headlight harness generally produces cracks and excessive heat radiation after driving your car of more than three years and affect the entire wiring harness system, which costs too much to replace the vehicle wiring harness completely. It is strongly recommended to add our dual high/low beam H4 headlight relay wiring harness to prolong the aging of your original car harness. What vehicle will this H4 wiring harness fit? H4/9003 conversions, H6054 H5054 H6054LL 6014 6052 6053 headlights etc. That means any vehicle using H4 headlight, and Jeep Wrangler YJ Cherokee XJ Trucks, Toyota Pickup etc. What special features does Partsam H4 headlight relay have? PE pipe with high heat resistance, never hardened Pre-Wired for plug and play, no need to modify the stock wires at all. With cabble length 2 meters, it's long enought to connect two H4 headlight. Votage: 12V Total Length: 2M Max Input Current: MAX 80A Pack Includes: 1 x set of H4 headlight relay wiring harness( with 2 ceramic plugs) Other Excellent and Polished Finish: H4 Plug: The built-in fuse can efficiently protect the circuit when high working current occurs. Two H4 connectors: Anti- aging, corrosion-resistant, heat-resistant high-frequency ceramic material, never melt. Two relays: Double protection, two 80A waterproof relays, made with premium quality material, providing functions of safety protection and conversion circuit.