I have a dishwasher with a switch with light below the switch to shut off and to turn on dishwasher. I want the light to come on when dishwasher is on and light to turn off when dishwasher is off. How do I do this?? I have a hot wire from fuse box to that single junction box with light switch combo. Then another cable going from that junction box to the dishwasher, which is hard wired to dishwasher.