The wiring diagram for a pool light transformer consists of several important components. These include the transformer itself, the pool lights, a circuit breaker, and a timer. The transformer is typically installed near the pool, either above ground or underground, and it connects to the electrical panel in your home... Wiring 12-volt pool lights isn't too difficult a process. All pool lights - whether 12 volts or 120 volts - have a sealed cable attached to them which is waterproof. You don't need to deal with the wires attached to the light at all.
Step 3: Wire Your Pool Lights. Step 3.1: Connect the Wires. Connect the white wire from the pool light to the white wire from the power source using waterproof wire nuts. Do the same with the black wire from the pool light and the black wire from the power source.. Here is a simple pool light wiring diagram: Power source: The power source should be connected to a dedicated circuit breaker or a transformer with the appropriate voltage for the light fixture. Light fixture: The light fixture should be securely mounted in the pool wall or pool deck, using the manufacturer's recommended installation method..