How do i power up my car radio?

I was hooking up the lights to my dual subs... I turned the car on to see how they looked they looked gxxd but the sound wad distorted. So I turned the car off and wen I did the radio never turned off till I disconnected the battery. I reconnected the...

i was connecting my car radio and the power wires touched the ground wires does anybody know how i can fix my radio?

I need to know the what wires go to what from each end (from the radio end and the power supply end)

I have this item... http://www.crutchfield.com/App/Product/Item/Main.aspx?g=247350&i=700XMALP1&tp=87&tab=detailed_info and It has a yellow and a black cable on the end... im curious how do I hook those up properly? I don't know much at all...

My subwoofers have stopped working in my car and I want to see if the amp is still working.

i have a pioneer avic-f90bt multimedia navigation receiver. (Radio + more) i have heard i can put the yellow and the red wires together and attach them to the positive side, and take the black ground wire to the negative side to power the radio. is this...

i have leds in my cars interior and i wired the power wire to the power wire of my cars radio

i have a chevy cavalier. I purchased an adaptor from best buy for $20 and installed it to the harness on the radio. once i plugged it in, nothing. i installed a DUAL radio. I need help.

but all fuses are good. the radio is also good as i tried it in my other vehicle. I tested the wire and the 12v wire gets no juice, also tried a different harness and no luck. I even checked the wire right b4 the harness on the side opposite the radio...