Installed a USA-1 radio and a new dual voice speaker(mono dash) today in my 70 chevelle. Hooked up both speakers and am having trouble with the 2 power leads. I ran the red wire(power) directly to the radio fuse at the fuse panel. I can get the radio to turn on and light up with the ignition on but no sound. I went to plug the orange wire(memory and clock) into the clock/radio fuse at the fuse panel and blew the fuse. I have the black wire grounded to a screw on the dash. Any suggestions? Thought I should at least have sound by hooking up the red power lead but nothing but light.