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Planet-9

Help needed with PCM 2.1 & Nav installation

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5 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHHelp needed with PCM 2.1 & Nav installation

Reported or suspected cause

bundle at the bottom

Suggestion or failed attempt

No successful repair reported for this finding.

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Identified cause
1
Suspected cause
0
Reported fixes
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that suspect a cause
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suspected cause

1 connection would be to an amp which is probably the bundle at the bottom

Help needed with PCM 2.1 & Nav installation
Frequently discussed work

Disconnect factory plug

No successful repair reported for this finding.

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Reported fixes
0
Unsuccessful attempts
1
Discussions
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Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

You need to disconnect the factory plug from the right side of the amplifier and connect the new fiber optic cable - plug.

Help needed with PCM 2.1 & Nav installation
Read full discussion summary

Leading evidence: 'bundle at the bottom' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'bundle at the bottom' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Disconnect factory plug' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.

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1 matching discussions · 5 captured posts examined · 1 partial discussions

Compare 4 other evidence results

Disconnect factory plug

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

You need to disconnect the factory plug from the right side of the amplifier and connect the new fiber optic cable - plug.

Help needed with PCM 2.1 & Nav installation

Run 2ft length

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

I went out to the car and tried running the 2ft Length from the connector behind the master cylinder vacuum tank to the

Help needed with PCM 2.1 & Nav installation

Run from the

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

My problem is that the 2ft length is not long enough to run from the

Help needed with PCM 2.1 & Nav installation

Run from the connection behind the brake vacuum tank down

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

The 3ft section is designed to run from the connection behind the brake vacuum tank down to the

Help needed with PCM 2.1 & Nav installation
Frequently discussed actions (6)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Disconnect factory plug

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

You need to disconnect the factory plug from the right side of the amplifier and connect the new fiber optic cable - plug.

Help needed with PCM 2.1 & Nav installation

Run 2ft length

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

I went out to the car and tried running the 2ft Length from the connector behind the master cylinder vacuum tank to the

Help needed with PCM 2.1 & Nav installation

Run from the

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

My problem is that the 2ft length is not long enough to run from the

Help needed with PCM 2.1 & Nav installation

Run from the connection behind the brake vacuum tank down

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

The 3ft section is designed to run from the connection behind the brake vacuum tank down to the

Help needed with PCM 2.1 & Nav installation

Run into the cab and two

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

The waveguide should actually have three plugs, one that is a female and connects to the cable running into the cab and two that would connect to an amp and cd changer.

Help needed with PCM 2.1 & Nav installation

Run though, thanks

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

I do think that that is how it's supposed to be run though, thanks.

Help needed with PCM 2.1 & Nav installation
Reported and suspected causes (1)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

bundle at the bottom

No successful repair reported for this finding.

0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that suspect a cause
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suspected cause

1 connection would be to an amp which is probably the bundle at the bottom

Help needed with PCM 2.1 & Nav installation
Coverage and how to read this overview

Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.

5 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

  • Planet-9: 1 discussions

0 evidence records excluded for query context · 1 excluded by outcome qualification · 0 adjusted by outcome qualification.

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261026T161109Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

Hello, I bought my 07 Cayman Basic last January, I've been very happy with the car - I owned an 86 911 for 19 years before that. My car had all the options that I wanted except it didn't have the PCM 2.1 or Nav system. After reading K-Man S' great articles on installing the PCM2.1 and the Nav ysytem I decided to do the upgrade myself. I'm well into the project - I've installed the PCM 2.1 nad have spliced together the wire bundle that powers the Nav unit. My problem is that I may be missinformed about what constitiues a Bose Surrond Sound system (it's important because the fiber optic cable harness is made for a specific configuration, e.g. with Bose Sound System , without Bose Sound System , CD/DVD changer, etc.). I have the Bose sub woofer in the passenger foot well area, does that mean for sure that I have Bose Surround Sound? Is it possible to have the Bose sub woofer in the passenger foot well and not have the surround sound system? It matters for the optical harness configuration. My other question/problem concerns the fiber optic cable that connects behind the master brake cylinder. My car came with a 2 optical wire bundle connecting behind the master brake cylinder, it runs around the back of the vacuum tank to the front, then it runs down and foward where it gets bundled with a mutli-wire bundle that disaappears into the driver's side bulkhead below the brake master cylinder assembly area. 1) Since I assumed I had the Bose Sound System without the CD Changer I ordered the optical waveguide part number: 997-622.710.00. The waveguide cable came with 2 connectors at the end that connects that will connect to the new Nav drive. According to K-Man S' article I only need one connector not 2 for the Nav drive unit. 2) What should be done with the original 2-wire optical cable that was connected behind the brake vacuum tank? As I mentioned earlier it's routed forward and below the brake master cylinder assembly area and into the forward trunk bulkhead. A) Does it go to an amplifier for the Bose system? B) Can the "loose" end just be secured out of the way once the new waveguide cable has been connected behind the vacuum cylinder tank? 3) Do I have the wrong optical cable, should I have just a single connector at the end that will connect to the Nav drive? That still leaves me with the problem described in 2 above (the now spare "loose" original optical cable). I know that several of the readers have done this upgrade and I'm assuming that at least one of your cars had the same configuration as mine - Bose system (still need to verify that a sub woofer in the passenger foot well means that the Bose system is installed), no CD Changer and the original CDR 24 AM/FM DVD head unit. Thanks in advance for your help. Larry Osborne:helpme:

POST 2Original post

This will be a quick reply, but I'm sure others will give more detail. Look on either door speaker. Unless I'm mistaken, you should see a Bose logo. That is a simple test. You typically have 1, 2, or 3 connections in the boot. 1 connection would be to an amp which is probably the bundle at the bottom next to the fix a flat. If you have a second, its either for a cd changer or a nav drive. Since you don't have pcm yet, it would likely be for a cd changer. The third connection would be for a nav drive. With Bose , you do need two connections in the boot. The waveguide should actually have three plugs, one that is a female and connects to the cable running into the cab and two that would connect to an amp and cd changer. You can not leave a plug open, because it would break the circuit. Its a bit like leaving an open pipe in a plumbing system. You can take apart the connector and remove the extra segment if you have enough length. Hope this helps.

POST 3Original post

Do you have the Sound Package Plus? You may have an amplifier in the trunk. I recently finished the install of the Nav unit on a 2006 Carerra. If you have an orange fiber optic cable running to your amplifier in your front trunk, you need to replace it with the new fiber optic cable. The fiber optic cable has 2 connections for your set up. One of them will plug into the back of the DVD Nav unit and the other on plugs into the Bose amplifier . You need to disconnect the factory plug from the right side of the amplifier and connect the new fiber optic cable - plug. If you need help you can email directly at [email removed] . Frank

POST 4Original post

Smunic's reply is exactly correct. I removed the cover to the tool kit compartment and found the Bose amp mounted on the bulkhead about 10 inches below where the Nav drive will be mounted. The original optical cable, 2-"wires", ran from the connector behind the brake master cylinder tank down to and plugs into the Bose amp . My new problem is this: The optical cable for my cars configuration ( Bose system without the changer) is Y shaped. The base of the Y is approx. 3ft long, the distance from one upper "leg" to the other upper "leg" is approx. 2ft. The 3ft section is designed to run from the connection behind the brake vacuum tank down to the Bose amp . There's plenty of cable for that. My problem is that the 2ft length is not long enough to run from the Bose amp up to and then behind the Nav drive. I would guess that it's about 6"-8" too short. Have any of our readers done this installation with the Bose system , without changer configuration? If so, did you have issues getting the optical cable to reach from the Bose amp up and behind the mounted Nav drive?

POST 5Original post

Thanks Sonny, I went out to the car and tried running the 2ft Length from the connector behind the master cylinder vacuum tank to the Bose amp and it was still about 6"-8" too short. I do think that that is how it's supposed to be run though, thanks. I had previously made an appointment for this afternoon at my local Porsche dealer to have the system "coded" to recognize the new PCM 2.1 and Nav drive. So I'll just have their tech guy make that final connection. I'll keep you all posted.

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