Shogun- Pressing the "band" button will toggle through the radios's functions. First: FM 1, then FM2, AM1, AM2, CD changer, then Weather Band. If a CD changer is correctly installed, it will come up. If not, the sequence will go from am2 to WB without stopping. When CD is displayed, the buttons on the front console (1-6) select which CD, and tune up/down controls song skip.

The wiring jack for the changer is integrated into the audio harness, so in all likelihood, if the rest of the radio works, there is either a problem with the connection from the changer to the harness, or a malfunction in the changer itself. Obviously check the connection at the rear. There is no installation protocol per ce, if it is connected, the system will recognize it. Alot of people get confused about the cd cartridges. The e34 ones are not interchangeable with the more recent e39 type (which is standard now I guess). The cd's go into the magazine upside down, with the shiny part facing you, and the label facing down.

Best, tim