Ok thanks A lot bro. If I run into any problems (I doubt it) I know where to go.

 

My Bose Cassette/CD HU died the other day and I thought...where else can I turn for help...so I'm here. I've noticed lots of 95 Bose HU on ebay and thought I'd swap my 94 for a 95 or later. Is this possible? Will I need an adapter because it looks like everyone with an aftermarket HU does.

If this is posted somewhere in the forums...I couldn't find it...sorry if it is.

Thanks!

 

Don't waste your time. Just get an aftermarket unit.

 

Yeah do what djfrestyl said. You'll prob be better of that way.

 

Another no sound issue here. saw a few other similar posts, but no real solution yet.

I pulled an older aiwa hu out of my truck to put in my 95 maxima...got the dash kit, ant. adapter, and 70-7550 harness because the aiwa only has 2 sub rcas so it seems the 7551 wouldnt do me any good with this particular hu anyway. its a little dated but has aux in for my ipod and decent eq so it does all I want it to.

got everything wired correctly except for one problem...the hu has no remote or amp power. Its listed on the hu's diagram, but apparently got pulled out or removed by the previous owner.

I figure no biggie, I'll just wire the amp turnon into the ignition or mem power, and hook the amp ground in with the hu ground. I'm no expert but this should work right?

now, I have power to the hu, plays cds etc...but no sound at all from any speakers.

I checked all my wiring 3 or 4 times now...everything is good. I do notice that when I touch the amp line to any power source I hear and feel a click under the passenger carpet. any idea what this is, and why even with the amp turnon wire powered I'm getting no sound?

does it need its own dedicated power and ground? and is there an inline fuse or something under my passenger carpet? I'd rather not tear my carpet up if I can avoid it, but I'm really curious what is clicking and moving under there.

thanks.

 

Give the HU dedicated ground.

Do you have Bose or not?

 

yes, its bose.

thanks, I'll try a dedicated ground and see if that does it.

 

Good - that should do it.

2nd concern: Since you have Bose you somehow need to take the speaker level outputs from the HU and convert them to line level for the Bose system. I hope you're using an LOC.

 

eh, wasn't aware I needed a loc...I just picked up the stuff from the first post and followed directions (or so I thought). I learn pretty quickly and have hooked up basic systems. but I'm still pretty green when it comes to car audio.

 

No problem, we'll get you through it. Though its best to ask BEFORE trying the install, just in case you mess anything up

Try that and let us know how it works.

 

I have a 98 Maxima w. Bose. I want to replace the HU, leaving everything else stock. Does my car have a factory subwoofer? I'm plaaning to use the 7551 harness to get clean signals to the speaker amps. Can I just buy a 2 channel preout HU, and then split those 2 channels to the 2 amps/speakers? I'm planning on getting the JVC Arsenal KD-AHD59, which has a 2 ch preout and a sub out.

Thanks,
Jack

 

Your car does not have a factory sub. Get a HU with 4 channel preout.

 

Ok, tried the dedicated ground...same result. power to the hu, but no sound from any speaker. From what I've gathered browsing around this and other forums, I'm thinking maybe my hu's internal amp is causing the problem? I dunno. Regardless...

Tonight I picked up the Scosche FAI-3A. From what I've read this may solve the no sound problem yes? I'm thinking I'll install it tomorrow. Anything I should know before going ahead with it?

Thanks.

 

Is the amp/remote turn on for the Bose connected? You're not going to get sound unless you get the LOC...

 

Wait, the scosche fai3a (aka slc4) output coverter is not what I need? I have seen where others have used it so I assumed this is what I needed. From what I could tell it looked like my options were the Scosche FAI-3A or PAC OEM-2, and the scosche was easy to find and pretty inexpensive. here it is...



and yes, I have the blu/wht amp power hooked up....not to a dedicated power line, its hooked into the 12v power, but I did find the port on the hu harness where its supposed to go. I can stick it in the port and get power but it was easier to just wire it into the 12v power...as I said earlier, when I touch it to any power line I can hear a click on the passenger floor, obviously something engaging, so I'm pretty positive the amp is getting power.

 

Yea, that's the one. The older model was black and had more wires coming out of it.

What it says it it takes 4 speaker level inputs (connect to your speaker leads coming from your HU) and converts 4 preamp RCA outputs. Here's the thing. You're going to have to take those RCA inputs and make them into wire format again to put it into the wire harness in the car. Easiest way to do it is by using the 70-7551.

I'd have just gotten a better HU and used the 70-7551.

 

well, I give up. I've spent the last 3 nights working on this thing and I still have no sound.

I hooked up the Scosche FAI-3A as a line out first and wired rca's into the speaker wires from the harness side. no sound.

then I took the rca's off and hooked it up as a factory amp interface (it said it could be used this way with bose among other systems). no sound.

with each try, I checked the gains, checked my fuses, checked my wiring, and LOC setting. I really don't know what the problem could be. I could've pulled the entire sound system out of my truck and installed it in the maxima with the time I've spent wiring and unwiring this thing.

I'm so frustrated with it at this point it looks like thats what I'm going to do anyway...I've had enough of this. I'll take back the scosche and just run the speakers from my truck. so now my question is, do I have to run all new wiring, or can I just pull out the bose speakers (and amps) and use the existing wiring to hook up my new speakers?

 

dude before you do that connect back the old headunit and check to see if there is sound coming out, if there is do not rewire the whole car....at least try another aftermarket headunit...maybe your aiwa is broken

if you're not getting an aftermarket amp and speakers then what's the point of replacing the BOSE....rewiring seems like a much bigger project then figuring out what's wrong.

 

lol. I just want sound at this point. I'm not looking to have a tricked out system, just some music for long rides. I was trying to avoid having to spend hundreds of dollars on a new head unit and kit...I'm not in a position to drop very much on it for a few weeks...I just ate through most of my savings moving. So far I've put under $100 into this project, so no big deal at this point, besides time and lost sleep.

Like I said, its got me so frustrated now it seems like it would be easier to just pull speakers out of my other vehicle and run them since its relatively straightforward and I know what I'm doing there.

But...I guess I'll take your suggestion and mess around with it some more before doing that. I'd really like to get it working...just have to have patience I suppose.

The aiwa worked great in my truck so no reason for it to suddenly lose sound...but I guess I'll check it with some speakers I know work to be sure. Its a cdc z127 btw, seen here...

 

Before I get some sleep, here is what I'm at. maybe someone will see something I'm missing.

I have the hu wired into the scosche FAI3, which is in turn wired into the metra 70-7550. I'm missing the remote wire off the hu's harness, so I have the blue amp turn-on wired into my red 12v power, and the amp ground wired into the hu ground.

I already tried a dedicated ground for the amp with no luck. I also spliced rca's onto the speaker side and plugged into the FAI3 rca jacks and got no sound. So, I pulled them off and wired the speaker side directly into the FAI3...still with no sound. I turned the gains up and tried all settings on the FAI3 with each attempt...line out, factory amp, and common ground. nothing, not even a chirp.

all fuses are good, and hu has power.

if anyone has any suggestions I would be grateful...I'm at a loss.

 

Alright.

First, read what I said about the harness. With using the Scosche, you still need the 70-7551, OR you need to splice in some cheap RCA's. Think about the levels you're converting to, and the levels the system needs.

Blue is POWER ANTENNA turn on, not amp. Amp turn on is blue/white.....

Amp ground you don't need. Dedicated ground is for the HU, not for the amp.

Where are you located? This is NOT rocket science.

 

Um the AMPS will NOT turn on without the remote turn on, did you take care of that issue yet? I'm 99% sure you're doing all this other stuff for no reason if that is not yet hooked up.

 

Perhaps I was not clear in my previous post...I did splice rca's to plug into the scosche. still got no sound. that when I decided to try the factory amp interface method the instructions that came with the scosche suggested for bose systems...which is just wiring the hu into one side, and the metra into the other. You keep saying I need to splice rca's to plug into the scosche's rca jacks, but if I have the 70-7550 harness, which has no rca's...and the scosche is set up to do either rca's OR direct wire, why would I need to splice rca's instead of just use the wire ports?

And about the blue wire, I meant the blue/wht wire...sorry, I was very tired last night. I have the antenna hooked up to the 12v power, it works.

And I'm in Mobile, al.

I realize its not rocket science...like I said, I'm green when it comes to audio, but I catch on quick. I'm a bike mechanic so I'm pretty mechanically inclined.

Thanks for the help.

 

thanks for the reply...

you can see in my last few posts my hu is actually missing the remote wire, so I have it wired into the 12v power.

when I touch the amp turn-on to any power source, I can hear something clicking in the passenger floor area...I assume this is something engaging, and the amp is getting power, of course I could be wrong...I really don't know. I just figured logically connecting power to power source + clicking noise = amp has power.

 

nm seems like an issue in wiring but hard to trouble shoot from the seat of my pants

 

I'm thinking the same...but I don't know where it could be. I've checked everything I can think of, and gone through every step repeatedly.

I've read somewhere that if one speaker/amp goes bad in these bose systems it can short all of them. Doesn't seem logical to me, and I've read conflicting reports of people just having 1 or 2 out with no problems...but I'm not familiar with them...is that true?

*sigh* I'm just grasping at straws now. I just can't see any reason for not having sound.

 

Sounds like you do have your head in the right place. It's hard to tell with new posters so sometimes we come across a little harsh.

I thought the Scosche had only RCA outs, my bad.

At this point I would go back to OEM HU just to double check everything still works. Then start over in a sense to see if you identify any mistakes you potentially made.

 

this is just an idea, but it's really all I can think off....does the Bose amp have any kind of signal sensing circuitry?

is it possible that it turns off if no signal is coming in?

 

^^yeah, while I'm thinking about it...any of you guys know if the amps have a fusible link or inline fuse or something that may be causing the problem? like anything other than the fusebox? I've checked those and all appear to be good.

I'm taking a break from it tonight...maybe start fresh tom.

 

Doubtful.

 

another idea, double check to see if you have the amp remote wire connected to the 12v source as opposed to the antenna amplifier/power antenna

 

yeah, amp remote is connected to 12v power.

Tonight I hooked up some old home stereo speakers to make sure the hu had sound...it did. however, I had some interesting results. I tried to run the hu through the scosche first...I plugged rca's into the jacks and got nothing...but when I took the scosche out and wired the home speakers direct they work. is it possible the scosche is bad? I'm leaning toward that right now.

I'm thinking I'll take the scosche back tomorrow and switch it out for a new one and try again.

 

well, I feel dumb.

looks like the FAI-3 is probably working like it's supposed to, as it's supposed to strip the higher voltage signal out of the HU speaker outputs and bring them down to line level...therefore not producing sound if there is no amp to run through. no wonder the crappy home speaker didnt work when I hooked it up. its not supposed to.


also found out the clicking on the passenger side is my amp relay...which is probably working fine since its clicking when powered on, although I'm going to check it out more thoroughly tom to be sure.

still have no sound yet, but I feel like I'm getting closer to finding the problem, even if that means its trashed and will have to be replaced anyway.

 

So, you haven't put to oem hu back in yet to make sure everything still works? This is going for way longer than it should.

 

original hu is fried. hence the replacement.

today is actually the first day off I've had since starting this...I was working on it at night after being at work for 9 hrs every day, so I was only able to put a few hrs at a time into it. today I can devote the full day to it, in daylight. should make things a lot smoother.

 

well, ran through everything pretty quickly this morning with daylight and plenty of sleep.

apparently previous owner has been in there doing who knows what...the amp relay cover was bent back when I uncovered it, and when I checked the r speakers the amps were held on with mismatched screws. I had looked over them at night a couple times while tinkering with it, but it wasnt till I had daylight to see clearly that I noticed the screws.

I did clip the rear wires and hook my test speakers up...they worked. so, with no way to know what he did, or where he did it...looks like it'll be easier to just replace them after all.

thanks for all the help anyway.

 

Sweet. Thanks for the write up.

 

My Bose headunit jus fried and i was able to put in an aftermarket radio using the metra dash kit and harness. Everything works except my stock sub woofers on the rear deck are not kicking. I noticed that there are two extra harnesses that connect to my stock headunit. Are they for the subwoofers on the rear deck? If so is there a harness or some kind of converter to hook them to the aftermarket unit?

 

Well, there is the main harness with power and front speakers, the secondary harness for rear speaker...and most likely the 3rd harness is for steering & trip computer. Sounds like your rear speaker harness isn't plugged in.

 

I just purchased this headunit along with the adapter and from what I can tell everything is connect correctly yet there is nothing coming out of any of the speakers. Is it absolutely necessary to go through the Scorche adapter box with the speaker wires or am I able to bypass it without having any issues? I appreciate any help that's given. Thanks.

http://www.crutchfield.com/p_500CDA1...5.html?tp=5684

http://www.crutchfield.com/p_142C4NN...n-Adapter.html

EDIT: It's too dark right now or I'd take some pictures of the wiring. I'll do that tomorrow after work.