For：
2004-2015 Toyota Prius
Core Features：
1. Plug & Play installationIt plugs directly into the factory taillight wiring connectors behind the rear tail lamps. Simply unplug the OEM tail light harness, insert this adapter in-line, then route the 4-flat connector down to your hitch receiver.2. 4-way flat trailer output (standard)Provides trailer running lights, left/right turn signals and brake lights for small trailers, campers, utility trailers.3. Weatherproof OEM-style connectorsSealed plastic plugs, corrosion-resistant terminals, suitable for off-road and wet conditions.4. Pure copper wiring + cable ties includedComes with zip ties for tidy mounting, keeps wiring secured away from exhaust and moving parts.Basic Installation Steps：
1. Disconnect the vehicle battery first (critical to avoid BCM damage)2. Remove rear tail light assemblies3. Plug the T-harness between tail light plug and tail lamp4. Run the 4-pin connector along the frame to the hitch, secure with zip ties5. Reinstall taillights, reconnect battery, test all trailer lights
