I have fitted a kenwood cd player - the zed came with a kenwood cassette player. But the problem was there before i fitted it. The problem is when ever the inside light comes on through opening the door or boot or manually turning it on inside, the radio switches off and the clock on the dash goes off, when the light is switched off the radio has lost all settings and the clock has been reset to 1.00. The radio also loses settings when the ignition is switched off. Is this normal???