Wiring a 24V LED step light RGBW involves several steps. Here is a general guide:

1. Prepare the power supply: Choose a suitable 24V DC power supply that matches the power requirements of your LED step light RGBW. Ensure that the power supply is compatible with your local electrical standards.

2. Connect the power supply to the controller: Connect the positive (+) and negative (-) terminals of the power supply to the corresponding input terminals of the RGBW controller. Follow the manufacturer's instructions for the specific wiring diagram of the controller.

3. Connect the controller to the LED step light: Connect the output terminals of the RGBW controller to the corresponding terminals of the LED step light. Typically, the LED step light will have four terminals: red (R), green (G), blue (B), and white (W). Connect the positive (+) output terminal of the controller to the common positive (+) terminal of the LED step light, and connect the four color output terminals to the corresponding color terminals of the LED step light.

4. Test the wiring: Turn on the power supply and test the wiring by using the controller to adjust the color and brightness of the LED step light. If the light does not turn on or function properly, check the wiring connections and ensure that the voltage and current are within the correct range.

Note: This is a general guide, and the specific wiring instructions may vary depending on the manufacturer and model of the LED step light RGBW. Always follow the manufacturer's instructions and consult a qualified electrician if you are not familiar with electrical wiring.