1 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHFront Firewall Passenger Side Grommet Removal
Leading reported evidence
Check potentially damaged systems
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 · Original poster
I would also like to know what wires are bundled in the harness at this passthrough or behind it in the back of the dash so I can check all potentially damaged systems.
Leading evidence: 'Check potentially damaged systems' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check potentially damaged systems' (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.
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 · Original poster
I will run this seemingly common 996 fault to ground with the standard troubleshooting, but first (as the most likely cause) I want to inspect/repair the harness where I drilled.
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 · Original poster
I will run this seemingly common 996 fault to ground with the standard troubleshooting, but first (as the most likely cause) I want to inspect/repair the harness where I drilled.
Replace pin-locked ddin pcm1), following guidance found
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 · Original poster
I am installing a new GPS antenna in the frunk for a Pioneer head unit (to replace the PIN-locked DDIN PCM1), following guidance found on various websites.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Check potentially damaged systems
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 · Original poster
I would also like to know what wires are bundled in the harness at this passthrough or behind it in the back of the dash so I can check all potentially damaged systems.
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 · Original poster
I will run this seemingly common 996 fault to ground with the standard troubleshooting, but first (as the most likely cause) I want to inspect/repair the harness where I drilled.
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 · Original poster
I will run this seemingly common 996 fault to ground with the standard troubleshooting, but first (as the most likely cause) I want to inspect/repair the harness where I drilled.
Replace pin-locked ddin pcm1), following guidance found
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 · Original poster
I am installing a new GPS antenna in the frunk for a Pioneer head unit (to replace the PIN-locked DDIN PCM1), following guidance found on various websites.
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.
1 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: 20261026T203514Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
New 1999 996 C4 Cabriolet owner seeking some front firewall passenger side grommet removal guidance/images (and as a new rennlist member, any forum etiquette corrections also welcomed )...
Fools rush in where angels fear to tread
... yep! I have stepped very carefully like an angelic fool!
I am installing a new GPS antenna in the frunk for a Pioneer head unit (to replace the PIN-locked DDIN PCM1), following guidance found on various websites. While slowly,
carefully
drilling a 1/8th" pilot hole through said grommet (above where the harness passed through at an angle, and as close to parallel as the confined space permitted - see photo below) I was horrified to find a 1/4" long single strand of copper wire on the drill bit and a small piece of green(?) sheathing.
Coincidentally (unlikely), a day later, I now have a CEL with fault code P0447 that likely resolves to an open circuit on the evap vent pump near the fuel tank (or similar). Its not critical, but it will fail the smog test and is sub-optimal for fuel economy.
I will run this seemingly common 996 fault to ground with the standard troubleshooting, but first (as the most likely cause) I want to inspect/repair the harness where I drilled. I'm really hoping to avoid a 4 hr dash removal with all the potential risks. Instead I am hoping that the grommet (see pic) can be removed from the frunk side, but I don't want to make the damage worse by blindly wresting that grommet from its 22-year resting place and further stressing the harness and electrical connections.
I have given myself an appropriate number of uppercuts for stupidity and am aware that I am recruiting a lot of hope in my resolution of the 'own goal'... but
If anyone has photos/experience/tips for inspection/servicing the harness at this location
(including potential connections behind the pass through in the back of the dash), I would be most grateful. I would also like to know what wires are bundled in the harness at this passthrough or behind it in the back of the dash so I can check all potentially damaged systems.
Needless to say my confidence from several successful mechanical and electrical repairs has been well rocked.
This is a source reference. Confirm exact model applicability in the original material.
