How do i power up my car radio?

My car radio doesnt get power , when i was removing the old one i forgot to disconnect the battery, it sparked?

• 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 still no power. Its a 92 gmc 1500 if that matters

• Answer:

  Check if the fuse is busted. You can find it between the power (red) cable (between the head unit and the battery connection. If replaced but still doesn't work then your in trouble. some fuse is located at the back of the head unit (screw type) or look for it at the main fuse compartment labeled "radio".