Battery changed in 03 Honda odyssey how do you get the radio back on?

the radio in your van has a anti-theft code that is needed to restart the radio when it looses power, most times(durning pre-delivery inspection) there is a sticker installed in the glove box with the code and\or serial number on it. The sticker is about one inch long by a half inch wide. the code will be 5 digits and the serial number will be 8. If the sticker is not there you will need to go to a Honda dealership were they can hold a group of buttons on the radio and get it to display the serial number which they can then use to get the radio code from Honda's Dealer only web site.