Pelican Parts

2004 911 C4S - Passenger Side Brake Light Not Working

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2 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCH2004 911 C4S - Passenger Side Brake Light Not Working

Leading reported evidence

Replace brake switch

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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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 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
Further, I replaced brake switch with original Porsche switch and light still does not come on.
Original post Read captured discussion
2004 911 C4S - Passenger Side Brake Light Not Working

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Leading evidence: 'Replace brake switch' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace brake switch' (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 · 2 captured posts examined · 0 partial discussions

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Test light, you can see

Suggestion or failed attempt

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
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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.

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Suggestion
If you have a test light, you can see which wires have power and which ones don't.
Original post Read captured discussion
2004 911 C4S - Passenger Side Brake Light Not Working

Use pick

Suggestion or failed attempt

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

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Suggestion
If so, you can sometimes use a pick to pull them up a bit so that they do make contact.
Original post Read captured discussion
2004 911 C4S - Passenger Side Brake Light Not Working

Frequently discussed actions (3)

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

Replace brake switch

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 · Original poster
Further, I replaced brake switch with original Porsche switch and light still does not come on.
Original post Read captured discussion
2004 911 C4S - Passenger Side Brake Light Not Working

Test light, you can see

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
If you have a test light, you can see which wires have power and which ones don't.
Original post Read captured discussion
2004 911 C4S - Passenger Side Brake Light Not Working

Use pick

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
If so, you can sometimes use a pick to pull them up a bit so that they do make contact.
Original post Read captured discussion
2004 911 C4S - Passenger Side Brake Light Not Working

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.

Pelican Parts: 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: 20261026T220748Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

The passenger side rear brake light on my 2004 911 C4S is not lighting up. All other brake lights; Rear driver side and Center brake lights are both working. I checked Fuses, light harness and bulb and all are in working condition. Further, I replaced brake switch with original Porsche switch and light still does not come on. Any suggestions of what to do next other than take it to my Porsche Mechanic.

POST 2Original post

If the driver-side and center brake lights are working, it doesn't make sense to swap out the brake light switch. Do you have a wiring diagram for your car? The Bentley service manual is a good source of information for 996 and early 997 cars. If you don't have this resource, there may be wiring diagrams online. If you have a test light, you can see which wires have power and which ones don't. What I would do is to work back from the non-working brake light and see where there is a dead short. Are you getting power to the brake light socket? If not, go back to whatever junction that feeds all three lights. Somewhere in between there is a wire break. If you're getting power to the socket, check that the socket has a good ground connection. One thing that can happen with light sockets is that the little spring contacts in the base can flatten out so that they don't make contact with the tips of the bulb. If so, you can sometimes use a pick to pull them up a bit so that they do make contact. I don't recall offhand whether the '04 brake lights have two-filament bulbs. Hope this is helpful...

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