deck has power but no illumination

My car is a 2000 Celica GTS and friend is a 1999 Sentra. He accedently hit the yellow wire and now the power button that use to be lit, doesnt any more. We also tried to reinstall his old deck, and that doesnt work too.

I am pretty sure that both of those cars have 2 fuseboxes.  1 in the car and 1 under the hood.  Did you check every fuse in both boxes?

We checked all the ones in the car, the ones under the hood are much larger and dont know how to see if there blown

The Celica may have a 3rd fuse box on the passenger side under the glove compartment.  Did you check that one too?

I would suspect the fuse to be under the hood if it is the constant 12v+ source. You will need to see if you can see the fuse connection to see if it intact or if has separated due to grounding out the hot lead. If you have a test light or DMM I would use that to check each fuse to make sure you didn't overlook anything. Sometimes fuses blow and don't cause much of a separation and do not appear to be blown.The wire I'm test'n isn't doin' what it's supposed to be doin'... I am so glad I printed that tech sheet, with the wrong info.

Do it right the first time... or I might have to fix it for ya

It will depend on what you want done. Run a new power wire wont take too long. About an hour so what ever it will cost for an hour labor and a fuse holder. If you want them to diagnose problem and repair then it will be a couple hours and parts as needed. I would run a new power line to ignition harness or just direct to battery with a fuse on constant 12v source. Fuse close to power source, 12 to 18 inches away. 14 awg or 16 awg wire will be more then plenty. Fused at 10 to 15 amps. It may take you an hour to two but doing it yourself you can save some money. If you have a problem working around voltage, disconnect battery and make your connection. It will prevent you from accidentally shorting out something.The wire I'm test'n isn't doin' what it's supposed to be doin'... I am so glad I printed that tech sheet, with the wrong info.

Do it right the first time... or I might have to fix it for ya