Street Glow Hott Wirez Accent Light

I had purchased a 10 foot Street Glow Hott Wirez Accent Light. I had installed it according to the direction and to a switch. I have the light and the switch installed according to their directions but whenever I go to turn the switch off it blows the 20A fuse for the cigar lighter. I have the light hooked up to the switch and the switched hook up to the cigar lighter. Along with the light is a 100W transformer. I was wondering why I keep blowing a fuse when I go to turn off the light. I can have it on and the fuse won't blow but when I go to turn it off, it blows. So I was messing about with it to try and figure it outr whe the light disconnected frmo the power wire. It's a black wire and a black wire with a wire stripe. I was wondering how I would reconnect those two wires to the light to make it work again along with why I keep blowing fuses when I go to turn off the light. Could someone please explain to me why the fuse keeps blowing and how to reconnect the light to the power wires?

To start with your switch was probably bad in the first place.  As for the wires I don't know with out looking at it.