Review on Enhanced SEO: Reese Towpower 78115 Insta-Plug Trailer End Connector with LED Circuit Tester - 4 Wire Flat by Kenneth Foster

The product looks good but there are problems with the cable connectors. The cable to the trailer headlight only has sporadic passage, sometimes the light works, sometimes not. The indicators and brake lights still work perfectly. You may have to disassemble the connector and solder the wires to the terminals, as other reviewers have reported. The plastic is very hard and difficult to dismantle in cold weather. Unsafe attachment of rubber terminal cover to connector body. Most likely it will crack during use, but time will tell. Country of origin of the goods = Taiwan.