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2007 CTS
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46 Posts
Discussion Starter #1
ok so I followed MJ's write up on installing a double Din unit while retaining the DIC. I did that with no problem but now I cant get any volume with my head unit turned all the way up and with my steering wheel turned up. Is that an indication of poor speaker connections? or something else? someone put me in the right direction PLEASE!!!!!!
 

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2015 XTS Premium
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Are ALL the speakers low? Or just certain ones?

Does your aftermarket unit have 2v or 4v preamps? 2v is too low for the factory amp (at least in the Bose system).

Other than that, yes check your connections. I have an AVIC-Z3 (4v preamps) and it cranks. So you should definitely have plenty of volume available if done right.

Oh another thing I just thought of - you ONLY removed the EXACT wires that the write-up mentioned right? Because if you removed or damaged one of the CAN bus wires, the amp may not be turning on.
 

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2007 CTS
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Discussion Starter #3
Raven, All the speakers are low, not sure on the 2v or 4v pre amps.(I have to check on that, but I don't have a bose system) I have un wired and rewired the speaker connections several times and no change. I even went to radio shack and got what I thought to be better RCA cables and still no change. I did exactly as the write up says for the speakers...... I cut one end off a set of RCA jacks, Tied the Right side positve and negative speaker wires together and tied them to the right side RCA jack, I was unable to get that drain wire on the RCA jacks to tie into the other drain line so I just cut the RCA drain line off. Then stripped the insulated line back and tied that into the Right side positive and negative wires I tied together. I did the same thing for the left side. Sound right???
 

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06 CTS Sport/Luxury package
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Does your chimes still work? If they don't, which they should, then you might want to check the fuse for the amp. It will be located in the one of the rear fuse boxes that are under the rear seat cushion.

KOT
 

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Tied the Right side positve and negative speaker wires together and tied them to the right side RCA jack, I was unable to get that drain wire on the RCA jacks to tie into the other drain line so I just cut the RCA drain line off.
This is worded wrong, or maybe you actually did it wrong. You need to tie the RIGHT SIDE POSITIVE WIRE (from the DIC plug) to the RIGHT SIDE RCA POSITIVE WIRE (from your aftermarket unit), and the RIGHT SIDE NEGATIVE WIRE (from the DIC plug) to the RIGHT SIDE RCA NEGATIVE WIRE (from your aftermarket unit). There are TWO connections for each RCA plug. You do not tie ANY positive and negative wires together. Repeat for left channel.

Also, if you can't get the drain wire connected to the shield built into the RCA wires, you may have interference issues. Here's the trick I used - connect the positive and negative speaker wires to the positive and negative RCA wires...wrap in electrical tape to insulate, but leave the drain wire and the RCA shield exposed. Now wrap the connection in aluminum foil, making sure that the foil contacts both the drain wire and RCA shield foil. Now wrap the whole deal in electrical tape to insulate. As long as you try to keep these connections as far away from the factory antenna wire as possible, you should have minimal (or no) interference.
 

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2007 CTS
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46 Posts
Discussion Starter #6
Thanks Raven I figured it out. I originally did exactly what I typed, then late last night I was just fooling around and did it the way you spelled it out an like magic they work fine funny how thinks work when you do them the right way. Although, I do have a little interference, I'm ordering a noise filter and I'll put that in and see, if that gets rid of it. One remaining question I do have is, I'm assuming I have to buy 2 noise filters one for each side to clear up the noise?
 

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Most low-level noise filters are two-channel. I haven't seen one that isn't, though i'm sure they exist. You just need to figure out if the one you order is single or two-channel.
 

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04 CTS 3.6L "The Gray Ghost"(R.I.P), 05 CTS 3.6L "Fin"
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I had a slight bit of interference as well.
I only used one filter and the noise was gone completely.
 
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