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Porsche Club GB

Bulb/Fuze/diagnonsis please

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11 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHBulb/Fuze/diagnonsis please

Leading reported evidence

Replace switch and the rear number plate light came back

Performed · outcome unconfirmed

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 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

I changed the switch and the rear number plate light came back to 100%.

Bulb/Fuze/diagnonsis please
Frequently discussed work

Check fuze and even

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

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.

Unsuccessful attempt · Original poster

I have checked the fuze and even changed it for the spare (fuse A5) and no improvement.

Bulb/Fuze/diagnonsis please
Read full discussion summary

Leading evidence: 'Replace switch and the rear number plate light came back' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check fuze and even' (1 discussions). For that action, 0 discussions report a resolution and 1 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 · 11 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Replace main light switch and ignition switches

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

Try a new fuse, but if lighting gremlins continue, I would suggest changing the main light switch and ignition switches.

Bulb/Fuze/diagnonsis please

Replace switch may well fix the problem

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

Changing the switch may well fix the problem.

Bulb/Fuze/diagnonsis please

Replace whilst i am in there

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

Does this have any impact upon the lighting issues or just co located and easy to change whilst I am in there?

Bulb/Fuze/diagnonsis please

Check fuze and even

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
1
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 report an unsuccessful attempt
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.

Unsuccessful attempt · Original poster

I have checked the fuze and even changed it for the spare (fuse A5) and no improvement.

Bulb/Fuze/diagnonsis please
Frequently discussed actions (5)

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

Check fuze and even

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

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.

Unsuccessful attempt · Original poster

I have checked the fuze and even changed it for the spare (fuse A5) and no improvement.

Bulb/Fuze/diagnonsis please

Replace main light switch and ignition switches

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

Try a new fuse, but if lighting gremlins continue, I would suggest changing the main light switch and ignition switches.

Bulb/Fuze/diagnonsis please

Replace switch and the rear number plate light came back

No successful repair reported for this finding.

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

I changed the switch and the rear number plate light came back to 100%.

Bulb/Fuze/diagnonsis please

Replace switch may well fix the problem

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

Changing the switch may well fix the problem.

Bulb/Fuze/diagnonsis please

Replace whilst i am in there

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

Does this have any impact upon the lighting issues or just co located and easy to change whilst I am in there?

Bulb/Fuze/diagnonsis please
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.

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

  • Porsche Club GB: 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: 20261026T191851Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

2002 Carrera C4S - a week or two ago the dip beam was reluctant to come on without a few attempts on the switch - a side light bulb was out - replaced this and all good again - tonight the clocks would not illuminate (digital read outs ok though) - I had a look for blown bulbs (thinking the car is maybe flagging up a problem to me?) and found the rear plate lights blown - does the car have a fault alert pattern that is telling me something or are all things electrical just going wrong? Any ideas please.

POST 2Original post

The number plate light an instrument cluster lights share the same fuse. Try a new fuse, but if lighting gremlins continue, I would suggest changing the main light switch and ignition switches. DIYs for both are in the Technical Articles section.

POST 3 / ORIGINAL POSTEROriginal post

Spot on Richard, many thanks.

POST 4 / ORIGINAL POSTEROriginal post

Further to that - the initial problem I mentioned re the side light being out and the dip beam being reluctant to come on - is this a built in indicator that a bulb is out or likely that my headlight switch is on its way out - for info the replacement bulb seemed to have sorted this hence my question.

POST 5Original post

Reluctance for the headlights to come on is a sure-fire indication that the main headlight switch is on the way out. I would do it straight away, as you don't want a situation that one of our members (John Ware) found himself in, where the headlights went out whilst driving on a dark country road! The ignition switch is a common problem too, and at less than £20 worth doing while you are in there. Get one of the Hella ones though - there are a lot of cheapie Chinese ones about that are rubbish.

POST 6 / ORIGINAL POSTEROriginal post

A bit confused now - I have the rear no. plate lights out - they are recieving power but only enough to faintly show the filament glowing orange - no light as such is produced. I have checked the fuze and even changed it for the spare (fuse A5) and no improvement. Any thoughts? Regarding new switches why won't they clean up - can they be cleaned up or does something breakdown within it?

POST 7Original post

I don't think you can get the switch apart to repair it. Up to you, but if it was me I would get a new switch, and then investigate the number plate lights. Changing the switch may well fix the problem.

POST 8Original post

Check out this thread, where John chased exactly the same problem: http://www.porscheclubgbforum.com/fb.asp?m=713754

POST 9 / ORIGINAL POSTEROriginal post

Yep, advice taken, part ordered at £97 - thats the headlight switch - though I am not following with the ignition switch - can't see it listed either? Does this have any impact upon the lighting issues or just co located and easy to change whilst I am in there? Thanks for your help Richard, very much appreciated.

POST 10Original post

It is just that you have to take the vent out to change the light switch, and the ignition switch is right behind it. Fiddly to do, so because it seems to be just the light switch, maybe leave it alone then.

POST 11Original post

I changed the switch and the rear number plate light came back to 100%.

This is a source reference. Confirm exact model applicability in the original material.