7-Way RV Blade to 4-Wire Flat. Hopkins offers a complete line of L.E.D. vehicle-to-trailer adapters. The L.E.D. series incorporates built-in trouble-shooting. If the trailer lights are not functioning correctly, you can isolate the problem by simply looking at the adapter. If the lights on the adapter are functioning, it's a trailer-side problem. If the lights are not functioning, the problem is with the vehicle.

• Includes function testing L.E.D.s
• Includes dust cover