High-Performance H4 Fog Light Wiring Harness with 40A Relay
Premium 180W auto-grade wiring harness ensures stable power delivery for H4 fog lights, featuring heavy-duty copper conductors and heat-resistant PVC insulation for extreme durability. Industrial-grade 40A relay guarantees instant activation and overload protection, eliminating voltage drops and extending bulb lifespan even under high-load conditions. Precision-molded connectors with waterproof seals provide corrosion-free performance in rainy or off-road environments, ideal for trucks, SUVs, and adventure vehicles. Plug-and-play universal design works with most aftermarket H4 fog light kits—no splicing required for quick DIY installation. Compact relay box with flame-retardant casing mounts securely in engine bays, engineered for vibration resistance on rough terrains. Bulk pricing available for auto shops and resellers—global wholesale supplier with factory-direct savings.