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Old Mar 17, 2008 | 08:23 PM
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Default Need help with amp install

I have added an amp and speakers with stock hu to my 08 C6. I spliced in the Pac addgm24. But it doesn't work. The amp has power, but nothing from the new speakers. I have not yet disconnected the center speaker, it still works along with the rear speakers. I took an old hu and hooked it to the amp and it works. What did I do wrong?

Also, to disconnect the center and rear speakers, could I cut the wires in the addgm24? If so, does anyone know which wires they are?
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Old Mar 17, 2008 | 08:57 PM
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Originally Posted by ls3
I have added an amp and speakers with stock hu to my 08 C6. I spliced in the Pac addgm24. But it doesn't work. The amp has power, but nothing from the new speakers. I have not yet disconnected the center speaker, it still works along with the rear speakers. I took an old hu and hooked it to the amp and it works. What did I do wrong?

Also, to disconnect the center and rear speakers, could I cut the wires in the addgm24? If so, does anyone know which wires they are?
Cutting the wires in the ADD-GM24 won't do you any good for killing the stock speakers. What you COULD do is cut the wires of the factory harness after the ADD-GM24. Go to this link:

http://www.lazyassgeek.com/c6-stereo...-unit-harness/

You'll see a pic of the factory harness, if you clip all of the wires identified there it will kill all the signal heading to the Bose amp, eliminating the center & rears that way.

Now as to the GM24 not working... you likely have a soldering issue on the RCA's or maybe a wire mix-up. This is what the harness should look like when you're finished soldering on the RCA's:

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Old Mar 17, 2008 | 09:31 PM
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I started with a Pac AMP-RCA and cut the end off and spliced it to the GM24 so it looks a liitle differant than the picture. But I twisted the wires together and soldered them so I know that they are together. I have two white wires for left front, and two gray wires for the right front. I could have they +- wrong, but I should still get something anyway?

I just did a continuity test from the pins to the end of the rca's and the connections are correct.

Last edited by ls3; Mar 17, 2008 at 10:00 PM.
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Old Mar 17, 2008 | 10:11 PM
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then it should work 100%
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Old Mar 18, 2008 | 01:42 AM
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If you want to remove the center or rear speakers, don't cut the connectors. Just unplug them, it's really easy.

Even though the amp is on, what wire did you connect the remote 12 volt to?
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Old Mar 18, 2008 | 10:50 AM
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most connect the remote to the fuse in the passenger footwell
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Old Mar 18, 2008 | 08:04 PM
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It works now. I don't know why it didn't before. I pulled the center speaker out as soon I as I got it working. I have not yet hooked up the remote, I just ran a hot wire to see how it was going to work.

Thanks for the help.
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Old Mar 18, 2008 | 08:33 PM
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Komoman curious what rca connectors do you use for your harness. i have used the radioshack ones but find them to be a real PIA to solder
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Old Mar 18, 2008 | 09:35 PM
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Originally Posted by pentavolvo
Komoman curious what rca connectors do you use for your harness. i have used the radioshack ones but find them to be a real PIA to solder
I grabbed some no-name female RCA's from Parts Express. They're not really any better than what I've seen at RS, but the benefit is they are one HECK of a lot cheaper, especially since you consider they're the same thing as the RS connectors. So if you have to toss one or two because they're too messed up to use it's not a major loss.
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Old Mar 19, 2008 | 12:09 AM
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Originally Posted by pentavolvo
Komoman curious what rca connectors do you use for your harness. i have used the radioshack ones but find them to be a real PIA to solder
I used the PAC RCA, I think they are like $5. I just cut off the ends and used a wire cap and tied the end good and toped it off with electrical tape.
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Old Mar 19, 2008 | 07:54 AM
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I'm going to do a thread today with how to make this harness, long overdue. But here are the part numbers I used:

RCA Jack Black Plastic Part Number 090-265
http://www.partsexpress.com/pe/pshow...TOKEN=66143077

RCA Jack Red Plastic Part Number 090-266
http://www.partsexpress.com/pe/showd...number=090-266
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Old Mar 31, 2008 | 08:53 PM
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Originally Posted by ls3
It works now. I don't know why it didn't before. I pulled the center speaker out as soon I as I got it working. I have not yet hooked up the remote, I just ran a hot wire to see how it was going to work.

Thanks for the help.
And now it doesn't work. When I turn off the power, and then turn it back on it doesn't work. If I remove the RCA's from the amp and then plug them back in it works until I turn it off again. The amp is a Blaupunkt THA 475 pnp. A red error light comes on on the amp when this happens.

There is some static in the left front speaker. If I swap the right/left rca's the static goes to the right speaker. I also tried using the rear outputs, no static, but still the error problem.
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Old Mar 31, 2008 | 10:17 PM
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sounds liek an issue with ur amp
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Old Apr 1, 2008 | 02:50 AM
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Originally Posted by pentavolvo
sounds liek an issue with ur amp


Error light does not look good. Or, the Amp could be going into protection if the speaker or RCA wires are not done properly. Call the MFG.


Check out Sonic for some good deals on amps, might make you feel better

Last edited by 805Z06; Apr 1, 2008 at 02:54 AM.
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Old Apr 1, 2008 | 07:52 AM
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I hooked up an old Pioneer hu (hooked to mototcycle battery and into the system) and it works, no static or error.

I have been trying to call Blaupunkt, but so far, haven't been able to talk to anyone.
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