Ok I bought a brand new JVC head unit off line for my girlfriend to replace her 5 year old Kenwood head unit. So the 1999 Civic Ex radio was already wired and everything, it has a harness, I installed the unit and it worked fine, the only thing is that the memory wasn't staying (we had to reset the settings everytime we started the car, well i figured that i needed to rewire the yellow wire and the red power wire. so i was trying to rewire the yellow wire and i had it by a set of pliers and the metal of the pliers barely touched the back of the head unit, this created a little spark but nothing major. i reconnected the wires to the original places that i initially had them and the power wouldnt come on. i havent tried to rewire the unit it yet the red where the yellow is and the yellow where the red is but i figured since it was working before it should work now. well i couldnt get it to power back up. i got very frustrated and tried everything to get it to work. the thing that i didnt really do is check the fuses which i should have done, i checked one fuse that said back up (radio) under the hood but nothing in the car fuse box. I am wondering if the unit should still be powered up even thought the 12V ignition wire and the 12V constant are switched (even thought it worked fine before), did i blow a fuse, or does anyone think that the little spark could have shorted out the whole head unit? please get back to me as soon as anyone can with any information, thanks.