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Left Brake light out, bulb and fuse OK - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCHLeft Brake light out, bulb and fuse OK - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Leading reported evidence

Test ok

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
The bulb and fuse tested OK, but I replaced them anyway.
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Left Brake light out, bulb and fuse OK - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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Leading evidence: 'Test ok' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Test ok' (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

Frequently discussed actions (1)

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

Test ok

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
The bulb and fuse tested OK, but I replaced them anyway.
Original post Read captured discussion
Left Brake light out, bulb and fuse OK - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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.

986Forum: 1 discussions

0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.

1 acknowledgements have no verified action link; they do not establish a repair result.

Outcome without a verified action link
I see a few other people have reported this problem, but nobody posted that their problem was fixed, or what they tried.
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No unique explicit quoted action; no causal link assigned

Generation: 20261027T042512Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

My left brake light is out. I get a warning message as soon as I turn the key on (no need to press the brake). The bulb and fuse tested OK, but I replaced them anyway. I tried to pry up a bit on the center contact for the bulb, no luck there. The right and center brake lights work, so it's not the brake light switch. The rear fog lights work (same fuse, different bulb) so the fuse has power. I see a few other people have reported this problem, but nobody posted that their problem was fixed, or what they tried. I'm out of ideas. Any suggestions?

POST 2Original post

What car is this? I am having this same issue with my 2006 Boxster base. I am leaning towards the rear control module that is under the seat of the 987.1. I dont seem to be getting the right voltage out. I have a replacement module from Specialized ECU. My light comes on for 1 second then goes off. It is only happening with my parking lights that have 3 bulbs. It is not happening with any other lights in the unit. I did the following troubleshooting: - Swap bulbs from other light - Send direct 12v power to wire from the rear control module side and lights gets turned on I am leaning towards something in the module going bad.

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