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Re: Factory Stereo Problem
Sounds like the speakers are blown did you have sound there before or is this somthing that just happend. I would try a new speaker if the problem is still there check the wires for breaks.But sounds like a blown speaker also find out if there is a factory amp and if you have done any new wiring to the sterio check that aswell hope this helps.
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factory amps are located on the stereo unit itself or in the trunk but only if the car was ordered with premium sound and the possibilities of that car being ordered with premium sound is unlikely. so at the harness in the back of the stereo find the speaker wires and hook up a 9 volt battery to the said speakers that dont work if they crackle then its in the stereo if not its the speakers or wires to speakers with battery hooked up and speakers dont crackle go to speaker and test with a vom and test for 9 volts dc
A little more detail. Do you mean speakers are crackling. Most likely blown the factory speakers. These are very cheaply made. And if you play music loud often they will blow easy. Is it completely stock system. If you relaced your stereo with an after market it may be the wrong ohms for the speakers or to much power and you need better quality speakes. If not coming in clearly make sure your antenna is tight and your wire harness are are connected securely. Let me know more details. Do you have infinity sound or not. Any after market components. Or completely stock.
I would guess that GM didn't hook these wires up to the factory stereo, as the factory stereo may not have the front back fade feature. They put the wires in to save you time if you decide to put another stereo in. Look under the dash, you will probably see the other end there. I'm not sure about this. Just a guess, but my tractor trailer is set up that way, and I only have 2 speakers, but wires are run to all possible speaker sites. Good luck.
Is it a standard version or Bose version? If it's a standard version then either the plug in the back came loose or the built in amp in the stereo is dying. if it's a Bose, then there should be a pre-amp some where under or behind the dash or possibly under or behind the rear seat/ trunk. In that scenario it's possible that the amp has gone bad. Another possibility regardless what version system is installed would be if a wire cracked and is showing somehow, grounding out causing the speakers to go out. Bad ground. maybe a loose plug behind the stereo. Also has the stereo every been replaced. Is it factory stereo and speakers.
Nissan change their color codes on their harnesses all the time , a diagram won't be much use. What has happened is that Nissan has a wire that appears to be an earth in the stereo harness , but goes live when the headlights are turned on ( it is there for the factory stereo to dim the lights when the headlights are turned on.) Easiest way to connect stereo is to use a Multitester set on 20 volts to find Power , Accessory and earth wires, remembering to turn your lights on and off each time to check for the Nissan sneaky wire. ( You are lucky, I have seen whole looms go up in smoke because of that wire ) To isolate the individual speaker wires, solder a couple of wires to a AA battery and " flash " it across the pairs of suspected speaker wires while listening for a " Crackle " from the speakers, this is a handy way to figure out which wires go to each speaker without having to pull the doors apart to look. Happy Fixing Marshall
Sounds like you're hooking up an aftermarket stereo.
The B+ is for a battery constant-on connection. you can find one with a voltage probe tool (looks like a pointed screw driver with a grounding wire attached... and a light bulb in the hande.
You can probe for a b+ connection by connecting the ground clip to a solid grounding point and probe for a wire that is "hot" while the key is off.
For the acc wire, find a wire with the key on that is hot, but goes off when the key goes off. There are several posibilities and any will work, as long as your lines to the stereo have a fuse..
Try radio shack, or stereo sales/installation place for ready to go plug adapter. For a few bucks, it saves headaches, and butchering the wiring in case you want to re-install old one later when trading in or selling the car.