I have a junction box in my bathroom ceiling with four wires coming in and out. none are grounded as it is an older house. One is the source one goes to the kitchen light one goes to a light switch and one goes to where there used to be a vanity with light and an outlet, then mounted to the box is a ceiling light. the vanity had constant power and the ceiling light worked then quit. My intention is to take the source power to old vanity wire then to ceiling light to the switch then to an oultlet then back to the source. Any suggestion or thoughts on this would be greatly appreciated. The only wires coming in and out are b&w.