Guitar Wiring Diagrams | 2 Humbuckers/3-Way Pickup Switch Wire & Shielding | 9V Battery Parts: 2 Humbuckers w/ 3-Way Toggle Switch: 1 Volume Control. 2 Humbuckers/3-Way Toggle Switch/1 Volume; Our wiring techs can design a custom wiring diagram for any brand and type of pickups with your choice of custom controls and options. Easy to read, affordable and delivered by email for FREE! 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. Amazon: Wolo (HS-2) Horn Button Switch Kit : Automotive ESUPPORT 12V Car Auto Red LED Light Momentary Speaker Horn Push Button Metal Toggle Switch 19mm. Horn Button Switch And Wire : Item Weight 2 ounces : Product Dimensions 3 x 1 x 6 inches : Country of Origin If you use the wiring diagram you will have to get a horn relay. my way was easier and works great. I used a 3 Typical Car Starting System Diagram - T&X Solenoid 2. Single Starter Relay Car Starter Wiring Diagram When large power starter is equipped, in order to reduce intensity of the current that passes through the ignition switch and avoid ablation of the switch, the start relay is often used to control the heavy current of the starter solenoid switch, and the ignition switch( Start position) is used to control the low current of the relay coil.