thank you so much for the detailed answer, this is exactly what I needed, unfortunately yes I already purchased the pioneer and cannot return but it fine I'll go thru your instruction and should be able to have everything workWelcome to Planet-9, the Friendly Porsche Forum...
A few questions:
- Do you intend to splice into the existing wiring on the car?
- Will you be using an adaptor or hacking/cutting/splicing?
And some comments:
- You've added a PDF that's labeled as CDR-24 Pinout?
Here is what that PDF shows:
View attachment 288888
(I left off the notes, but perhaps I'll add them..)
View attachment 288889
The diagram is quite clear on INPUT and OUTPUT.
OUTPUT means that the electricity is coming FROM THE CDR24.
INPUT means the electricity is going into the CDR24.
A2 is switched power OUTPUT - so the CDR24 provides 12V on this wire when the CDR24 is turned on. It sends that 12V off to something that needs power like an ASK amplifier (if one is part of the system.) That might be used by another device as a trigger to turn it on. Notes 1 and 3 explain that (which is why they sent you to them..) So - no this isn't a good choice for power that's switched by the ignition key. Absent the CDR24 that terminal will be basically dead. A7 - "Switched Battery Input" would be much more suitable for this application.
Your black wire - ground - can go to a chassis ground OR as you determined the brown wire in the harness.
Your Purple/White wire - the video trigger for a reversing camera - only is needed IF you are adding a backup camera. And yes - I tapped mine off using a Positap the wiring going to the starboard side taillight assembly. That should work. Most backup camera wiring setups use a coaxial cable for the video signal and they include a "traveler" - which is a red wire inside the coax that can be connected to the backup light at the rear of the camera and has an output coming out at the other end, which will be behind the radio. It's made for exactly this situation - providing a trigger signal to the headunit to switch it to backup-video mode.
Your light-green, parking brake signal. That is a wire that will enable playing video when the parking brake is engaged. Most people simply ground it, which enables playing videos whenever you want to (but I'd suggest not playing it whilst driving.) So - that one could join the black wire going to ground...
The blue/white wire - system remote control - I'd assume is used to trigger external devices like an amplifier - and guess what? Since you're not using A2 for anything - that's where that wire belongs. If you have an amplifier it will turn it on. If you don't have an amplifier it won't do anything at all, so the connection only has an upside, no downside. blue/white to A2. Easy.
The final two - I'd ignore them. Why would you want to trigger a "mute" - if you're doing phone through it - that's already done inside the unit?
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OK - now onto some other things:
1 - Embedding PDF's - is generally a don't do it here sort of thing. The reason being it requires someone trying to HELP you to download a potentially virus-laced file. Most of us simply won't do that. Do what I did (I had a clean copy of that file) - open the file, then use a screen capture program to capture and resize the section that's significant to your question and paste it into the thread. No need to open anything. No risk of viruses.
2 - Have you already purchased this headunit? If you haven't - or if it's returnable - you might want to consider Outstanding Tech Contribution! - DIY on installing an... - which is a less expensive Android-based unit made specifically for the 987/997 series Porsche.
It fits into the dash like it came from the factory. It's not a 10-minute installation (there are some components you have to mount around the car, like the GPS antenna, the 4G-LTE antenna if you option that, etc..) but it doesn't require hacking up or splicing into the factory wiring on the car. It plugs into that wiring.
Just sayin' - it's cheaper, it has KNOBS, it can do Sirius XM via an Android app, and it does Apple CarPlay and Android Auto. And we know quite a bit about it. There isn't a lot of documentation on it yet - but we're growing that right here.. and you'd save about $200.
IMHO, the biggest downside to the one you're considering - is no knobs. You have to use the touchscreen for something as simple as muting it or turning the volume down. You'll find that distracting and annoying.
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If you're already committed to the Pioneer - that's fine, but - I'd strongly suggest getting a plug-in-adaptor for the factory harness that plugs into the cable (where it plugs into the CD24) and has wire stubs coming out of the adaptor to splice to your Pioneer wiring. That way if someone wants to go a route that enables Plug&Play - the wiring is still there and intact for them to use.
If you don't want to spend the $7 or so for the adaptor (they're all over Amazon and eBay) - then spend some money on "Positaps" - these allow you to tap into wiring without destroying it. I do not suggest those damn "StotchLok" splice connectors - they DO destroy the wiring. Only use Positaps. They make ones that go from one size of wiring to a different size. Since Porsche kept the weight down by using skinny wiring the size change ones are really very handy to use.
3 - You haven't introduced yourself. That's sort of tradition here.. you can find where to do it at: New Member Introductions - tell us about you, tell us about your car, and show off the car with some photos!
Looking forward to seeing your intro message, welcome once again to the Friendly Porsche Forum!
will ask again if anything does work and will take some time to introduce myself in the new member section, what a nice community!
