Radio doesnt work

2 things to check why your battery die. check the alternator by turning your ignition on. set gear to neutral, accelerate upto 3000rpm and measure the battery voltage accelerating. voltage should be in range of 12 to 14v. if your not using a maintenance free battery, check the battery solution/fluid level. 2nd. check for any short circuit it might have. hook up an ammeter on one side terminal of your 12v battery with all units/accessories off, door close, monitor the dc current amount flow. normal reading is below 1A (should be in mA, 5 -100mA). . for the radio cd, does the unit goes on when power is on? if not check the fuse that supply the unit. if you cant find the fuse, try hook up the radio supply to the battery directly with fuse installed. this time the unit should on. if not, with 12v presents your unit is defective. let us know some updates as we are going to handle it one by one. hope this helps.