13 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHLocate Radio & Amp ground 99'
Reported or suspected cause
introduced
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
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 report identifying a cause
1
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Reported cause
I always try to go back the the last change before the problem was introduced.
Leading evidence: 'introduced' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'introduced' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check any corrosion' (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 performed work without a confirmed outcome
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.
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 performed work without a confirmed outcome
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.
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 performed work without a confirmed outcome
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.
Performed · outcome unconfirmed · Original poster
- I tested the amp with direct power to the batter
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 performed work without a confirmed outcome
1
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed · Original poster
- I tested the radio with direct power to the battery
Check coils and the part number is beru 0040100177
No successful repair reported for this finding.
0
Reported fixes
1
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that report an unsuccessful attempt
1
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Unsuccessful attempt · Original poster
- I checked the new coils and the part number is Beru 0040100177 which is the updated coil pack for the 996 model. - I have added noise filters at the amp and radio - did not work
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 could test this out by removing the serpentine belt and running the engine for just a very short period with the radio on....see if the buzzing is still there.
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.
13 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.
3 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
1) Located block to chassis ground, clean with wire brush and reinstalled - still getting engine noise
Hello Folks,
I recently got the ignition noise through my radio, but ONLY when the car is on, thus I am pointing at a bad ground.
I have a '99 996 with the Hifi Nokia sound system.
Can some please tell which wire is
ground
on the radio harness and frunk amp?
Thank you all.
If the radio is using the stock wiring harness, then the brown wire is ground. If the amp is aftermarket, hard to say unless, again, they used the stock wiring harness to connect the amp. You might either have to do some wiring tracing in the frunk or find the wiring diagram for the Nokia.
Stock radio and amp it is then. It is the brown wire. I believe the ground point is right next to the battery in the frunk. Pull the battery cover and look next to the battery on the wall. Also the main battery ground is there and it might be a good idea to clean it up and check for any corrosion.
Hello Again,
Things tried:
1) Located block to chassis ground, clean with wire brush and reinstalled - still getting engine noise
2) Grounded radio directly to the battery negative terminal - still getting engine noise
3) Grounded amp directly to the battery negative terminal - still getting engine noise
4) Cleaned all negative leads to battery terminal - still getting engine noise
The car did get an engine out service and new coils were installed, if that makes a difference.
Thanks,
I always try to go back the the last change before the problem was introduced. If you had your engine out and coils replaced, and the interference started right after that, it seems like an area to investigate.
Update: Buzz still happening on my car.
- I checked the new coils and the part number is Beru 0040100177 which is the updated coil pack for the 996 model.
- I have added noise filters at the amp and radio - did not work
- I tested the radio with direct power to the battery
- I tested the amp with direct power to the batter
- I checked the grounds, cleaned and reinstalled.
- I checked the connections to the coils
- I don't want to take it to the shop and spend a few $100
I'm clueless
Tags: Porsche Carrera 911 996 Radio noise bad ground buzz
It's a long shot but about the only other thing, given all that you have done, is bad diodes in the alternator voltage regulator. How many miles on your car? You could test this out by removing the serpentine belt and running the engine for just a very short period with the radio on....see if the buzzing is still there. Other than that I do not have any more ideas. Might be time for a professional installer to take a look.
This is a source reference. Confirm exact model applicability in the original material.
