Re: Bypass amplifier?
 

caz1429 wrote:
> "caz1429" wrote:
> > I also wonder about this. I hooked up my kenwood head unit in
> > my 04 Sonata and I get power and no sound. Can anyone confirm
> > for sure that there is some kind of external device. Also, do
> > you need to use the "Power control wire" from your head unit?
> > Any help at all would be appreciated.
>
> Well I looked on hmaservice.com and looked at wiring diagrams for 2004
> Sonatas. The CD Player/Cassette combo for some wires said "Amp left
> front (+)" etc. I took off the trunk liner and found the amplifier. I
> was hoping i could just strip the wires going to the amplifier and
> solder them to the wires going out of the amplifier. The problem is
> there are more wires going into the amp than coming out. If I figred
> out what the speaker wires were and soldered them, and just taped up
> the power wires going to the amplifier, could I keep the existing
> wiring and have it work with my aftermarket deck?

Please tell us exactly where under the trunk liner you found the amp.
I'm willing to be proven wrong -- I don't recall seeing one on the
diagram for the 2000.

There is one type of amp hookup that I don't regard as "Kosher," which
may be in use. That is, the amp would actually get speaker-level signals
from the "head unit," which would actually be an ordinary-powered
complete car stereo. In this case, you'd see four audio wires going in,
plus the 12v + supply and the ground wire. There'd be four wires going
out to the rear speakers; maybe others for more speakers. Running
shielded "line-level" lines from the head unit to the amp would appear
as only two thick wires going in for audio. I definitely prefer doing it
this way, but it's got to be done properly.

There's as many people selling fancy car-stereo special wires as there
are for home stereo -- almost all of it unnecessary BS. But they've got
to be made up correctly.

Richard

Re: Re: Bypass amplifier?
 

"" wrote:
> caz1429 wrote:
> > "caz1429" wrote:
> > > I also wonder about this. I hooked up my kenwood head
> unit in
> > > my 04 Sonata and I get power and no sound. Can anyone
> confirm
> > > for sure that there is some kind of external device.
> Also, do
> > > you need to use the "Power control wire" from your head
> unit?
> > > Any help at all would be appreciated.
> >
> > Well I looked on hmaservice.com and looked at wiring diagrams for 2004
> > Sonatas. The CD Player/Cassette combo for some wires said
> "Amp left
> > front (+)" etc. I took off the trunk liner and found the
> amplifier. I
> > was hoping i could just strip the wires going to the
> amplifier and
> > solder them to the wires going out of the amplifier. The
> problem is
> > there are more wires going into the amp than coming out. If
> I figred
> > out what the speaker wires were and soldered them, and just
> taped up
> > the power wires going to the amplifier, could I keep the
> existing
> > wiring and have it work with my aftermarket deck?
>
> Please tell us exactly where under the trunk liner you found
> the amp.
> I'm willing to be proven wrong -- I don't recall seeing one on
> the
> diagram for the 2000.
>
> There is one type of amp hookup that I don't regard as
> "Kosher," which
> may be in use. That is, the amp would actually get
> speaker-level signals
> from the "head unit," which would actually be an
> ordinary-powered
> complete car stereo. In this case, you'd see four audio wires
> going in,
> plus the 12v + supply and the ground wire. There'd be four
> wires going
> out to the rear speakers; maybe others for more speakers.
> Running
> shielded "line-level" lines from the head unit to the amp
> would appear
> as only two thick wires going in for audio. I definitely
> prefer doing it
> this way, but it's got to be done properly.
>
> There's as many people selling fancy car-stereo special wires
> as there
> are for home stereo -- almost all of it unnecessary BS. But
> they've got
> to be made up correctly.
>
> Richard

Well I took some pictures

http://www.geocities.com/mcpages/trunk.jpg
http://www.geocities.com/mcpages/trunk_closer.jpg
http://www.geocities.com/mcpages/amp_wires.jpg
http://www.geocities.com/mcpages/amp_front.jpg
http://www.geocities.com/mcpages/amp_side.jpg
I also took the wiring diagram from hmaservice.com and fixed it up a
little in MS Paint.
http://www.geocities.com/mcpages/wiring.bmp


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Re: Bypass amplifier?
 

I am the original poster of this thread and this is what I found out.

There is indeed an external amp in the '05 Sonata. It didn't make sense
to me to rip out the trunk liner looking for it. When I ordered the
Sony CD unit from Crutchfield, installation instructions for this
particular car were included, but didn't mention the presence of
another amp or how to deal with it.

So after I hooked up all the wires from the adaptor harness, I saw
there was a green wire not being used in the main harness. A call to
the friendly Crutchfield guy confirmed that there is indeed an external
amp, and this wire powers it. All I had to do was hook up the
blue/white wire power/amp wire to the green wire, bypassing the harness
for this wire only, and I had beautiful sound! So simple...