YELLOW WIRE: Not needed. RED-BLUE WIRE: Twist for the accessory you want. And so that the blue LED also lights up when you press the button. Or twist red and green together and the LED will always be on! GREEN WIRE: positive (+)! and BLACK WIRE is grounded (-), I took a little test, but I understand! Will buy more. And The Switch is the size of a penny! This way you can mark where you will place and buy b4! Hope this helps you!
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