Yup, the second fuse is for the clock and station preset memory. It is always tied into some other circuit that is always live. Look for the interior lights fuse. I'll be adding some more model-specific information shortly.
Is there also a cassette player in your radio? My very long reply only pertains to the cd-only radios and the cassette-only radios. It doesn't apply to the cd / cassette combos.
Tuesday, March 23rd, 2010 AT 1:21 AM