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Ditching the Bose..Need Help

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Old Jan 12, 2012 | 01:45 AM
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Default Ditching the Bose..Need Help

The time has come to replace the entire Bose system in my 1990 C4. This includes the HU and all speakers. I have been searching the forum for about 3 hours and I have read every topic regarding this procedure. I have installed numerous systems in the past and this one by far has me scratching my head. I will try to keep my questions brief.

1) Is the SES or SYS light an issue either way by connecting or not connecting the illum wire?
2) Can I use a new (standard) HU wiring harness when replacing the Bose speakers/amps or will I still need the bypass harness from (Crutchfield)?
3) Regardless of the type of harness, I know that I will need to run all new speaker wire. In this sense, can I simply plug the new harness into the factory harness and wire it for just the power, ground, antenna? By doing this I could then direct connect the new speaker wire to the HU harness?
4) Power Antenna- Not to concerned about this as I would mostly be lisenting to music from an Ipod connected to the HU, but anysuggestions on doing right would be great

I hope I am making sense as I think I have gone cross eyed from looking at this screen for so long. Thanks in advance for any suggestions.
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Old Jan 12, 2012 | 02:19 AM
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take the oportunity and improve the sound system

after many years, repairing the unit, and amplifier. at last I removed the bose system

was a great system, but now exist better option at very affordabel price.


you can install a new unit, single or double size unit. the adapter sells in a lot of places.
double size includes video screen and gps,mp3,sd,usb ipod

I installed a single unit alpine with usb and ipod ready.

I tried 3 configurations.

1 setup

1.- Front 6 1/2 boston acoustic 2 way component
2.- rear 6 1/2 woofers
3.- 4 channel amp
4.- 2 way electronic crossover audiocontrol

great accoustic the bass sounds in front

2 setup

1.- Front 6 1/2 boston acoustic 2 way component
2.- rear 6 1/2 speakers
3.- 4 channel amp

better overall sound and cheaper

3 setup

1.- Front 6 1/2 boston acoustic 2 way component
2.- rear 6 1/2 speakers
3.- 4 channel amp
4.- 10" woofer in 1 cargo storage side (non abs)
5.- 1 channel amp
6.- audiocontrol epicenter

a lt more bass but really dont need it for me

the point is that with a new stereo and 4 speakers you will have a better sound quality, mp3.

the rear speaker enclosure already exist, front you need to make it, mine in fiberglass
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Old Jan 12, 2012 | 09:09 AM
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You will find lots of answers in the Audio/Electronics section of the Forum. You can not only find out how to do the install but what units will work the best.

Also look for posts by CF member "C5 Bearsfan" for information. Dennis is a Supporting Vendor and his business is stereo equipment and installs. Absolutely tremendous customer service. Just call him and tell him what you want to do. You will get tons of help and suggestions from him. Here's his website: http://www.doubledmods.com/
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Old Jan 12, 2012 | 02:37 PM
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Originally Posted by GotZoom
hope I am making sense as I think I have gone cross eyed from looking at this screen for so long. Thanks in advance for any suggestions.
If there wasn't a change from 89 to 90 in the config of the Bose systems, I'd send you a scan of the wiring diagram. And, that's what you need to be looking at.

If it's similar to 89, you'll be able to "borrow" some of the OEM wires/harness for your new system. That's if you're feeling the need to do so. In my case, I used the front harness wires/plugs to feed sound to the door speakes. (That was after I bypassed the door amps. IOW, I reused the factory front Bose.)

For the rear, I ran new wires. I also "cheated" and used one of the rear factory speaker wires to pass my amp turn-on voltage. My amp is mounted in the rear. (Mostly, that because I forgot to run a wire for it until after the front carpet was re-installed.
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Old Jan 12, 2012 | 03:53 PM
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Originally Posted by GREGGPENN
If there wasn't a change from 89 to 90 in the config of the Bose systems, I'd send you a scan of the wiring diagram. And, that's what you need to be looking at.

If it's similar to 89, you'll be able to "borrow" some of the OEM wires/harness for your new system. That's if you're feeling the need to do so. In my case, I used the front harness wires/plugs to feed sound to the door speakes. (That was after I bypassed the door amps. IOW, I reused the factory front Bose.)

For the rear, I ran new wires. I also "cheated" and used one of the rear factory speaker wires to pass my amp turn-on voltage. My amp is mounted in the rear. (Mostly, that because I forgot to run a wire for it until after the front carpet was re-installed.
Thanks for the input everyone. If you could send me the diagram that would be great. I will pm you my email
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Old Jan 12, 2012 | 04:38 PM
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Originally Posted by GREGGPENN
If there wasn't a change from 89 to 90 in the config of the Bose systems, I'd send you a scan of the wiring diagram.
Please re-read.
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Old Jan 12, 2012 | 04:40 PM
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I've got a Power Acoustk PTID-7250Nr double din head pushing 4x50
watts out to a Planet Audio AC1800.5 1800 with 300w x 4 and 600w x 1
to sub.
Fits like a glove with just a little cutting in trim panel. Best thing I've done to the vette.

Sony 6x9 and Sony's up front.
Clear tunes low or deafening
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Old Jan 12, 2012 | 04:41 PM
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I've got a Power Acoustk PTID-7250Nr double din head pushing 4x50
watts out to a Planet Audio AC1800.5 1800 with 300w x 4 and 600w x 1
to sub.
Fits like a glove with just a little cutting in trim panel. Best thing I've done to the vette.

Sony 6x9 and Sony's up front.
Clear tunes low or deafening

ALL new Monster cable and power to amp straight to battery. I let the SYS alone

Last edited by jispr; Jan 12, 2012 at 04:43 PM.
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