I have a 2004 yukon and my front door speakers are

Pull speakers and test one by one.

Hi candy Love , I love that name ! What Altima ? S ,SE or SL

AUDIO

Revision: May 2004 2002 Altima

AUDIO PFP:28111

System Description EKS002KQ

BASE AND MIDLINE SYSTEM

Refer to Owner's Manual for audio system operating instructions.

Power is supplied at all times

through 15A fuse [No. 31, located in the fuse and fusible link box]

to audio unit terminal 6.

With the ignition switch in the ACC or ON position, power is supplied

through 10A fuse [No. 6, located in the fuse block (J/B)]

to audio unit terminal 10.

Ground is supplied through the case of the audio unit.

Audio signals are supplied

through audio unit terminals 1, 2, 3, 4, 13, 14, 15, and 16

to terminals + and - of front door speaker LH and RH

to terminals + and - of rear door speaker LH and RH

to terminals + and - of tweeter LH and RH.

BOSE® SYSTEM

Refer to Owner's Manual for audio system operating instructions.

Power is supplied at all times

through 15A fuse [No. 31, located in the fuse and fusible link box]

to audio unit terminal 6, and

to Bose speaker amp. terminal 1.

With the ignition switch in the ACC or ON position, power is supplied

through 10A fuse [No. 6, located in the fuse block (J/B)]

to audio unit terminal 10.

Ground is supplied through the case of the audio unit.

Ground is also supplied

to speaker amp. terminal 17

through body ground B117.

Audio signals are supplied

through audio unit terminals 1, 2, 3, 4, 13, 14, 15, and 16

to speaker amp. terminals 23, 24, 25, 26, 27, 28, 29, and 30.

Audio signals are amplified by the speaker amp.

The amplified audio signals are supplied

through speaker amp. terminals 2, 3, 9, 10, 11, 12, 13, 14, 15, 16, 18, and 19

to terminals + and - of front door speaker LH and RH

to terminals + and - of rear door speaker LH and RH

to terminals + and - of tweeter LH and RH

to terminals + and - of subwoofer LH and RH.

SPEED DEPENDENT VOLUME CONTROL (MIDLINE SYSTEM AND BOSE SYSTEM)

If activated, the radio output volume will be automatically adjusted to compensate for increased driving noises

at higher driving speeds.
The radio receives a vehicle speed signal from the combination meter, and selects the output volume.

The Bose system is set up differently from other radios...each speaker has its own seperate power amp, so you have two connections to each speaker, the 12v power, and the low level signal...you can use a front speaker to plug into the rear wires and if it plays, you need a new speaker/amp...if it doesn't, you're missing power or signal for that channel...

Next time it does it take your fist and hit the top of the console armrest, toward the rear of the armrest, if it stops suspect the Rear Seat Audio module, I'm assuming you have one because I've replaced 3 in the last few months for this exact problem,it sounds like an alt. whine up and down with the engine speed, yes the amp is bolted to the floor under the console, you can pop that RSA module out and let it hang until it makes the noise and then lightly hold it and tap on it to see if the noise goes away. The RSA needs to be programmed to the truck at a dealer.
Hope this helps
EZ

all the speakers and chimes stopped working.

fit a supressor ,also run a earth cable from radio to battery direct ?' often works

sound like the head unit's out put mosfet is going bad, but i have also ran in to this problem when it was a speaker wires shorting out. so first check the connection on your rear speakers.

In the yukon it has preamplify,if you disconnect stock stereo the amp is not workind unless you know how to find it. You gotta let the car-toy hook it up for you.

there are actually amps located with the each rear speaker that are originally for the Bose speakers in the car.. its a little black box in the kit that holds the speakers in.. you can see them plainly from the trunk..

It is likely that these amps, or their fuses have shorted..

Check there..

i found the service buliton on this problem straight from GMC, bulletin No. 07-08-44-008 this is a recall issue and you need to go to the dealer to have them resolve.. i was locked out of your other question please rate this with the other one you have up... thank you Dave