I've read multiple threads that go in multiple directions for various issues and it's overwhelming. My car is an '03 C4S with Bose. I'm hoping for some simple answers to by issues below: 1. No sound. I've tried the Volume reset to CAN and AMP and back to CAN and no dice. I'm not using the fiber optic loop wire as I didn't think it was needed in an '03 and newer 996. 2. Unit doesn't turn on or off with the key. Bizarre issue and we can't figure out. Can only be turned on or off manually. 3. No night illumination of buttons. Oddly the buttons for PSM, rear window defogger etc also are now dark when headlights on. Main gauges are lit as normal. We checked and rechecked and can't figure it out. Obviously I'm missing something or we screwed something up. Also the control unit that is placed on the metal tray only has the one cable coming out and into the back of the unit. There's another female connector with nothing plugged into it. Maybe something needs to go there? Thanks in advance.
Discussion summary
YOUR RESEARCHPCCM Issues - New install
1 matching discussions were examined; no attributable action/outcome evidence was detected. No consensus or repair conclusion is claimed.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Read captured repliesInsufficient extracted evidence does not mean there is no answer in the original discussions.
1 matching discussions · 2 captured posts examined · 0 partial discussions
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.
2 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
- Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T174436Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Figured it out. Stock fiber cable needed to go into the back of the control box. The other issues seemed to fix themselves. Thanks for everyone's help.
This is a source reference. Confirm exact model applicability in the original material.