2002 Ford Focus battery replaced and now the radio is dead.

You have a draw, check all the lights in and out make sure they all off when the car turn off, keep an eye on the brake lights.

Your battery is most likely dead if your lights go out. Charge or change your battery, but your altenater maybe be bad. It recharges your battery, if it don't work your battery will die..

Quick and free fix sir or maam.The radio locks up when the battery is removed on today's cars.I don't know who decided to start it but it is somewhat stupid...I think anyhow.All you have to do is call a Ford dealer and they will give you the code and method to unlock your stereo.Write it down because your battery may get disconnected for many other reasons than a dead battery when repaired.I am pretty sure they just need the VIN.You can put aftermarket stereos in too if you ever want to.Good luck! Greg

you will have to reenter the radio code found in the owners manual, just follow the instructions

my radio locked

clean all batter connections including any samll wires on battery.

found out there is a 10 amp fuse on the back of the radio itself,replaced it and all is well

My radio can be on even without the key in (01 focus) maybe the radio is directly wired to the battery cable and your wire has been fried or damaged from the 'jumping'. You may want to carefully inspect the little wires attached to your actual battery connectors.

That's my guess.

this is usually a sign of a bad starter when you turn the key and will not turn over but not sure why it died when stopping!

check if all the power leads have been connected to the battery, the maybe a small power connectiono that has fallen down the side of the battery when you changed it , this may solve it