Toggle Switch Wiring - learningaboutelectronics SPST Toggle Switch Wiring. We will now go over the wiring diagram of a SPST Toggle Switch. Below is the wiring schematic diagram for connecting a SPST toggle switch: SPST Toggle Switch. You can see that a SPST toggle switch only has 2 terminals. 1 terminal is How To Wire A 2 Prong On/Off Toggle Switch - Rocker Switch Click to view on Bing2:31How To Wire A 2 Prong On/Off Toggle Switch. How To Wire A 2 Prong Rocker Switch. Or called a 2 pin switch. Here I use a 2 prong switch for my horn/ siren: ht..Author: Automotive JunkieViews: 130K Wiring a 2-Way Switch - how-to-wire-it How to wire a 2 way switch. Wiring This simple diagram below will give you a better understanding of what this circuit is accomplishing. Now in the diagram above, The power source is coming in from the left. Notice the black wire is the only wire that we are controlling through the 2-way switch.