Question about Alpine CDM-9821 CD Player

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Changed battery cable now radio will not even come on.

After changing battery cable radio will not even come on. I have checked the 50 amp fuse under hood the amp fuse and the in line fuse from radio and fuse box all good. Is there a code or something wrong with amp. This is driving me nuts I can't get power to unit. Please help

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  • geeper415 Jan 14, 2009

    The 50 amp fuse was for booster amp. not for radio

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When you said inline fuse I get the idea that this is not the original radio. Do you have power on the inline fuse? The 50 amp fuse you checked is a bit much for a radio. There may be a smaller fuse in another fuse area of what car type you have. If you do not have power at the inline fuse find some where you do have power (12vdc) and connect to it. If you have power at the in line fuse check the ground wire. If you have a test light or someway of checking for power test all fuses everywhere. If you have a fuse location guide for this vehicle look for the fuse for radio. If it was a add on or after market radio they probably caught power from the original source That is fused under the dash.

Posted on Jan 14, 2009

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  • Mike Schmidt
    Mike Schmidt Jan 14, 2009

    When you said inline fuse I get the idea that this is not the original radio. Do you have power on the inline fuse? The 50 amp fuse you checked is a bit much for a radio. There may be a smaller fuse in another fuse area of what car type you have. If you do not have power at the inline fuse find some where you do have power (12vdc) and connect to it. If you have power at the in line fuse check the ground wire. If you have a test light or someway of checking for power test all fuses everywhere. If you have a fuse location guide for this vehicle look for the fuse for radio. If it was a add on or after market radio they probably caught power from the original source That is fused under the dash.

  • Mike Schmidt
    Mike Schmidt Jan 14, 2009

    When you said inline fuse I get the idea that this is not the original radio. Do you have power on the inline fuse? The 50 amp fuse you checked is a bit much for a radio. There may be a smaller fuse in another fuse area of what car type you have. If you do not have power at the inline fuse find some where you do have power (12vdc) and connect to it. If you have power at the in line fuse check the ground wire. If you have a test light or someway of checking for power test all fuses everywhere. If you have a fuse location guide for this vehicle look for the fuse for radio. If it was a add on or after market radio they probably caught power from the original source That is fused under the dash.

  • Mike Schmidt
    Mike Schmidt Jan 14, 2009

    That explains the 50amp fuse. Did you check to see if voltage was actually getting to the amp from the fuse? And is there power getting to the fuse holder? If yes to both then you have lost your ground. I misunderstood that there was no power to the radio or the radio does not come on. Did you change both cables or just the positive? Please advise

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