Question about Alpine CDA-7840

Alpine CDA-7840 Just installed in a 92 4Runner, Rear channel speakers do not work with the CD. Have check the balance and the fad. Everythings is fine with just the radio.

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Brian Neathery

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156 Answers

Some 4-Runners have a factory system that uses a separate amplifier to power the rear speakers. In this case you need to activate the amplifier using the blue/white remote output from your Alpine deck. It sounds like the wire that activates the amplifier is currently attached to the deck's blue "power antenna" output, so that the amplifier is only on when the tuner is selected. Disconnect whatever is attached to the blue wire behind the deck, and attach it to the blue/white wire instead. That should solve the problem.

Posted on Jun 09, 2007

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Alpine CDA-7840 Just installed in a 92 4Runner, Rear channel speakers do not work with the CD. Have check the balance and the fad. Everythings is fine with just the radio.

1 Answer

Brian Neathery

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Related Questions:

Alpine CDA-9885 has no sound to rear speakers when playing a CD. Works OK when in tuner mode?? What up??

I have the alpine cda-7894 in my 1994 mustang. I have the mach speaker upgrade. When I play my music the sound has no depth and sounds very flat with no bass, but if i change the balance to the right or...

How do you set the time on a CDA-7840 car stereo?

Blown Speaker Channels

How to ajust speaker front to back

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Alpine cda-7892 Head unit overheating

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CDA-7840

Alpine CDA-9885 has no sound to rear speakers when playing a CD. Works OK when in tuner mode?? What up??

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alpine 7840 has power but no sound. all speakers are connected corectly,except for a pink and black one. i have no place for it. what do i do?

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Alpine CDA-7840 Just installed in a 92 4Runner, Rear channel speakers do not work with the CD. Have check the balance and the fad. Everythings is fine with just the radio.

1 Answer

Brian Neathery

Add Your Answer

Attachments: Added items

Related Questions:

Alpine CDA-9885 has no sound to rear speakers when playing a CD. Works OK when in tuner mode?? What up??

I have the alpine cda-7894 in my 1994 mustang. I have the mach speaker upgrade. When I play my music the sound has no depth and sounds very flat with no bass, but if i change the balance to the right or...

How do you set the time on a CDA-7840 car stereo?

Blown Speaker Channels

How to ajust speaker front to back

Problems with amp or stereo

No Sound from rear speakers when playing cd Alpine CDA-9851

Works fine through 4 chnl. amp on radio until you switch to cd then rear speakers turn off

No sound to the in car speakers from my alpine cda-9827 cd player

Alpine cda-7892 Head unit overheating

Not finding what you are looking for?

CDA-7840

Alpine CDA-9885 has no sound to rear speakers when playing a CD. Works OK when in tuner mode?? What up??

Open Questions:

alpine 7840 has power but no sound. all speakers are connected corectly,except for a pink and black one. i have no place for it. what do i do?

Related Topics

Related Topics:

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