Review on 🚗 Twidec/5Pcs Waterproof LED Lighted Rocker Switch Toggle 12V 30A SPST 3 Pin On-Off Blue Round Dot Switch for Car Boat Marine ASW-20D-BU: Enhance Control and Safety in Your Vehicle or Vessel by David Boone

I confirm that the diagrams on Revain are correct. What is wrong is a small sticker on the back of each switch. As others have said, GND/Earth is the pin directly under the LED. The middle pin is connected to the positive side of the battery. The last pin or the pin opposite the LED connects to the positive side of the lights or whatever you are trying to control. The negative side of your battery and the negative side of the lights you want to control are connected to the GND/ground of the switch.Update: Downgraded from 5 to 2 stars. Not only is the circuitry wrong, which I figured out the correct wiring and could live with, it's the double throw switches; SPDT, not SPST (whatever that means). I used them with the color changing LEDs available from Revain. Everything was working fine until I hooked up a wire to the brake light to make the LEDs glow red when braking. If the switch is not in the ON position, the fuse will blow. I threw 8 fuses until I swapped it out for a switch from another manufacturer and everything works fine. It is a pity that this manufacturer does not correct the information about the product they sell.