TWTADE/16MM 12V Car Horn Push Button Blue LED Lighted Momentary Metal Speaker Air Horn Toggle Switch with Wires BK-GLB16-BU

No paperwork nothing!! How do you wire it? What color does what??

No wire instructions, had to follow wire diagram on the Amazon site. Red is negative and black is positive, not an issue, just be aware. I looks good installed and works great!

You do have to look at the back of the switch, may need a light, but it's marked with terminals: 1 - positive LED light 2 - negative LED light NC - normally closed (switch not pushed) NO - normally open (switch not pushed) - this is a terminal that will typically be used to power horn or relay for horn. C - common - this is a terminal that will typically be used with NO (above) to complete the circuit to power horn or relay for horn. The switch has nice, even LED back lighting. The button has excellent tactile feel, with good travel and a "snap-in" feel to it, rather than just feeling like you're pushing against a spring. Mine came with the black lead going to LED +, and the red lead going to LED -, opposite the way it should be, so don't go by the lead colors! Being a bit anal, I used a small jewelers screwdriver to depress the connector tab in the switch socket to remove and swap those leads to be - black and + red. If you do this, you will probably need to pry the connector lock tab back out a bit for the connector to again lock in place. I gave it 5 stars in spite of the wiring snafu, as the switch itself in very nice.

Installed on my train horn , good horn button working great !!

Perfect for my install!