Review on 🚙 Enhance Your Toyota Sienna's Towing Capability with CURT 55580 Vehicle-Side Custom 4-Pin Trailer Wiring Harness by David Stewart

Installed on my 2007 Sienna along with a 4-way flat to both 7-way round and 4-way flat adapter (#57674). My trailer's headlights didn't work properly (sometimes the brake light only worked on one side or the turn signals didn't work). Had my mechanic put new headlights on the trailer but the intermittent issues persisted. After spending nearly $400 on labor and hardware (trailer only), I finally determined that the load for this wiring (probably an adapter) was too much and so replaced the main trailer lights with LED inserts. Seems to solve the problem. Adding a warning to the description that this product may not work with full size double tail utility trailers with position lights would have saved me a lot of money and time.