If the power does not reach your light switch, it could be a bad light switch, a problem with the wire connections, tripped breakers, or a bad light fixture. To fix the problem, change the light switch and fixture, reset the breaker, and call an electrician for wire cases. I have a junction box outside for a flood light. The box receives constant power and sends it to a detached garage,and I have an attic fan, power box, and a light switch to install. This is the way I think it should be installed but want I have power at one switch box with 3way then 6 lights then. The good news is that most issues are easy to troubleshoot, especially if you follow the steps below. Test the Circuit When devices in your new box don't work, you start by testing the circuit. The term “has power” means voltage is successfully reaching the fixture box, indicating the circuit breaker and main wiring run are functioning correctly, but the. I bought a house (about 30 years old) and installed a ceiling light fixture where there was a spot for one.
[PDF Version]