The answer to 'my rewiring won't turn on' is that there could be several common causes, such as a tripped circuit breaker, a faulty electrical connection, or a problem with the new wiring itself. Symptoms may include no power to outlets or lights, flickering or dimming lights, or the circuit breaker tripping repeatedly.
To troubleshoot, first check the circuit breaker and reset it if tripped. If that doesn't work, inspect the new wiring for any loose connections or damaged components. Checking for continuity with a multimeter can help identify the issue. However, if you're not comfortable working with electrical systems, it's best to call a licensed electrician to diagnose and fix the problem safely.