hey

i am sure most of you had put neon lights under your cars..., what i wana know is this:
i put my 2 blue neon lights under my car, and did what it told me to int he paper..... and then i was using a swtch to turn the lights on and off, someone told me that i dont ahve to do that no more, they said that all i need to do is put the switch wires on the ignition, "one wire is from the fuse box. and one from the neon lights, " this makes it so when i turn my car on.. and when it is still on park... the lights come on, but if you move the gear thing down to R D 2 1.... the lights go off..what i dont understand... is that when i turn my car on afta i did this... the fuse i have on one of my wires in the fuse box.... blows???? i tired differnet fuses and the same shit happens.... i tried to the battery and the lights dont come on.....HELP ME!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!