Product Overview Rocker Switch with Blue Cap Round rocker switch for automotive/boad/RV applications, can switch up to 20 Amp. The blue cap lights up when the switch is in the ON position, and goes dark in the OFF position. The switch has 3 terminals: The +12V (battery) is applied to the center silver terminal. The device to be switched is connected to the other silver terminal. The brass terminal must be grounded. The switch is snap-in mounted through the front of the panel through a round 21mm diameter (13/16th inch) cutout. Also available with Red, Green or Amber caps. Reviews (No reviews yet) Write a Review