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WIRING ALPINE CDM-7874 - Alpine Car Audio & Video

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I need a wiring harness that plugs into the back of alpine cd player cdm-7874 & a user manuel

Posted on Sep 26, 2008

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Hello my name is Israel, I just came upon this question. Do you still need an installation kit for this vehicle? Please let me know, so that I can help you.

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Alpine cdm 9823 does not make any sound at all everything but it does not sound at all


This may have one or two things going on here:

First, do you have car ampifiers in the vehicle? If so, this is an indication that the problem might be with and amp....check power and connections at the amp.

Second, it may be a radio setting. In the settings menu on the Alpine, there is an option to turn the internal amplifier on/off. Make sure that it is set to on or you'll have power and no sound.

Third, you may have a speaker short or bad speaker somewhere. To protect it's internal amplifier, the radio will turn off the sound output when it sees a speaker is shorted or grounding somewhere in the system. This can happen when a speaker's voice coil goes bad or when a speaker terminal contact is touching metal somewhere in the car.

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I have an Alpine Model CDM-9821. I just bought another vehicle and want to install my alpine in it. I have all of the wiring hooked up properly but am unable to get my unit to power up. I have 12.5...


did you use an installation harness? you should have the following when you test-
red wire-12v only with key on
yellow wire-12v at all times
reverse your test light to check the ground wire should be 12v with test light hooked to pos

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