Review on 🚗 ESUPPORT 12V Car Auto Blue LED Light Momentary Speaker Horn Push Button Metal Toggle Switch 19mm: Enhance Vehicle Safety and Style with a Multi-functional Switch by Joseph Morris

I almost gave up on this switch, tried two days off and couldn't get it to work. You should read other reviews and look at the schematics. My problem was that I used an LED wire harness, which is good because it comes with a relay and a pre-made wire harness, but it took me a long time to figure out how to connect them to the switch. When using LED harness kit, black is ground, white is plus and blue is accessory. Other websites and yahoo answers will tell you that black is positive and white is negative, which confused me. But after trying everything in different ways, here's what happens: we solder two contacts as in the diagrams in the reviews and connect the wires as I just said. You will save some time. I don't want you to suffer like me. Much luck.