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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHSpoiler Brake Light
Leading reported evidence
Test unit and all bulbs work
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
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Leading evidence: 'Test unit and all bulbs work' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check 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.
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Suggestion
There is a way to check the switch using the end of the wire harness by grounding the pin for this switch but I can't remember which color wire it is on the end of the plug.
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
There is a way to check the switch using the end of the wire harness by grounding the pin for this switch but I can't remember which color wire it is on the end of the plug.
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.
4 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Generation: 20261026T191851Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Have a 996 cabrio and when the spoiler is raised, it kills the normal 3rd brake light like it is suppose to but the spoiler brake light doesn't light up. Bench tested the unit and all bulbs work. Any tips for troubleshooting?
Thanks!
There are two micro switches located side by side that the drive arm from the motor make contact with. The switch that turns on the 3rd brake light on the edge of the wing that is hidden when the wing is in the down position may be defective. When the wing goes up the switch for the chassis mounted light should turn off as the arm touches the switch and at the same time the other switch is turn on. (They are mounted side by side) Either that or one of the wires is loose or has fallen off.
You have to remove the wing and lid from your car (way easier) and get your hand up between the black metal base that you see on the inside of the lid and the base of the wing to get to it. Check switch with an ohm meter. There is a way to check the switch using the end of the wire harness by grounding the pin for this switch but I can't remember which color wire it is on the end of the plug.
Do you have the light on the dash for wing "up" position working? These switches do double duty and act as limit switches and the lamp on the dash ties into this circuit. I believe there is only one brake light fuse as I found this out installing new LED taillights. (Don't ask!) It could be just a loose connection to the lamp strip or the wire has fallen off the switch terminal.
I've taken a pic of of the switches out of my old wing for you.
Good luck.
No light on dash when the lid is in the up position. New to the 996 and didn't even know it had one. Thought it only had one for faults. Sounds like the coulprit. Thanks for the info!!
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