HOW TO WIRE 3 PRONG ROCKER LED SWITCH - YouTube Click to view on Bing5:2212v Car Help: How to wire a 3-prong led rocker switch Amazon: Buy Round Switches: http://amzn/2jgQLcp Ebay: Buy Round Switches: http://tinyurl/zn5h6moAuthor: ImStricken06Views: 1 Wiring a DC socket - why three pins? - Electrical I have a DC power supply which has a positive tip polarity. I'm good to go and wire up the socket but I am a little stuck as there are 3 pins on my socket. From the look of the socket it's fairly obvious which pin is for the center pin (which I will wire pos) so I assume the other two are for the outside (which I XLR 4-Pin wiring for DC power connections Another well used convention can be found on many cameras, where pin 1 is 0V and pin 4 +12V, others not connected. A further specialized use of the XLR 4-pin when DC power is carried is the DHD RM4200D CAN bus connector, which has pin 1 at +24V and pin 4 (connected to shell) at 0V. The bus signal is on pins 2 and 3. Toggle Switch Wiring - Learning about Electronics We will now go over the wiring diagram of a SPDT Toggle Switch. Below is the schematic diagram of the wiring for connecting a SPDT toggle switch: SPDT Toggle Switch. A SPDT toggle switch has 3 terminals. Terminal 1 can connect up to any load to power a certain device. And terminal 3 can connect to any load to power any device. How to wiring DC solenoid valve with 3 wire This solenoid work with 24VDC and have 3 pin/ wire. There is No 1, No 2 and GND pin. I will never tried to wiring directly without enough information. How to switch the solenoid valve position (from A to B and from B to A) with 2 wire 24V adapter (24V and GND)? What does (-)(+) mean in wiring diagram? (See picture attachment) The full manual