A swamp cooler wiring diagram outlines the electrical connections and components that power the unit. It includes the water pump, which circulates water through the cooler’s cooling pads, and the fan, which blows air through the pads to create a cooling effect. The diagram also shows the electrical connections for the motor that powers the fan and pump, and the wiring for the float switch that prevents the pump from running dry. Understanding the wiring diagram is crucial for troubleshooting, maintaining, and repairing the swamp cooler effectively.