Amazon.com: Hopkins 47345 4 Wire Flat Adapter :
Quickly convert your 7 blade vehicle side connector to a 4 flat trailer end connector. This adapter has a patented weatherproof design. Integrated LED lights lets you know if know when wiring is functioning properly. Also, includes dust cover for 4 Flat to help prevent corrosion. Includes Function Testing L.E.D.s Plug-In Simple! Adapter
Get Price