I have an Alpine CDA-9847 and when I change the source on the deck off of the tunner it turns off my amp. I have checked the wires and all the fuses but I cant seem to find a problem. Can someone help please asap.
You are taked the wrong cable to turn on your amp......alpines have a two blue cables one of theme start the power amplifier and the other one start the electric antenna when you turn the radio,if youre earing the cd or tape and change to the radio this cable have 12 volts to startup the antenna.....solution .....just try change the other blue cable.
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Are you using an amplifier? If so, it sounds like you are using the blue wire, which is a power antenna remote turn on, in stead of the blue/white wire to turn the amp on. The blue wire turns off when leaving tuner mode, turning the amplifier off also.
first, you might want to check your speakers and speaker wires to make sure you have no grounds, shorts or bare wires. if they all check out, the output ic is located behind the big heat sink (an aluminum piece of metal with fins) on the back of the deck.
it sounds like you are using an amplifier. if so, make sure you are using the blue/white wire to turn the amp on instead of the blue wire. the blue wire is antenna remote and turns off when leaving tuner mode. the blue/white wire is amp remote.
You could have damaged the speaker, try another speaker or buy a volt meter and check the speaker ohms. You could also set the meter to read A/C voltage and put each lead to the positive and negative speaker output on the amp and see if the amp is outputing any voltage. Hopefully it is just the speaker and not the amp.
What kind of car did you install this in? Did it have a factory radio in it? If I had to take a guess I would think that there is a factory amp that you may have hooked the blue wire from the alpine deck to. If this is the case when you switch to CD the alpine deck turns off the power to the power antenna lead(blue wire) and thus your factory amp. If this is the case hook the factory amp turn on to the blue and white wire and you should be good to go.