Review on 🔊 APIELE 16mm 12V Momentary Speaker Horn Push Button Toggle Switch - 0.63" Mounting Hole - 1NO 1NC SPDT - Pre-Wiring Socket - Car Auto Motor - Black Shell (Green, Black Shell) by Sean Spence

These buttons serve their purpose perfectly. I ordered 3 different colors - red, green and blue. Blue has a different button feel and the harness is wired differently and the pin arrangement is different. Compared to the wiring of the other two buttons, the green and yellow wires on the green button are reversed. I assumed each of the buttons would have the same wiring and wired them as such, but when I wired everything up to test I found that the green button didn't work. I had to cut the yellow wire and connect it to the green one to make it work. This lack of consistency can be very frustrating, whether you're just binding a few keys or even more if you're doing this type of work on a regular basis. Conclusion: Don't trust the wire colors. Use a multimeter to check how each button should be set. To be on the safe side, match the button to the seat belt and label each component so nothing gets mixed up during installation. These buttons were used in conjunction with the Adafruit sound card to replicate Marc Robert's horn in my cars.