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Tried to hook up flasher for third brake light

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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCHTried to hook up flasher for third brake light

Leading reported evidence

Test wires

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Suggestion

Find a multimeter, set it for 12vDC and test the wires.

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Tried to hook up flasher for third brake light
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Leading evidence: 'Test wires' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Test wires' (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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Use brown

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Suggestion · Original poster

Kahtec support says that Porsche uses brown for ground and black for hot.

Original post Read captured discussion
Tried to hook up flasher for third brake light

Use brown as ground

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Suggestion

Seriously though, Germans have been using brown as ground for decades.

Original post Read captured discussion
Tried to hook up flasher for third brake light

Use inline taps

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Suggestion

If you used the inline taps but did not cut the wire, you will not have interrupted the circuit, and the Kahtec unit will be bypassed.

Original post Read captured discussion
Tried to hook up flasher for third brake light
Frequently discussed actions (4)

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Test wires

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Suggestion

Find a multimeter, set it for 12vDC and test the wires.

Original post Read captured discussion
Tried to hook up flasher for third brake light

Use brown

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Suggestion · Original poster

Kahtec support says that Porsche uses brown for ground and black for hot.

Original post Read captured discussion
Tried to hook up flasher for third brake light

Use brown as ground

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Suggestion

Seriously though, Germans have been using brown as ground for decades.

Original post Read captured discussion
Tried to hook up flasher for third brake light

Use inline taps

No successful repair reported for this finding.

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Discussions that contain suggestions
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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 used the inline taps but did not cut the wire, you will not have interrupted the circuit, and the Kahtec unit will be bypassed.

Original post Read captured discussion
Tried to hook up flasher for third brake light
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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.

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

  • Rennlist: 1 discussions

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Generation: 20261027T201111Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Porsche is 03,C2 cab. Itried to hookup a third brake light flasher unit but it did not change light. Brake light operates normally. There are 3 wires on flasher, red,blue and black. The light has brown and black. I attached black flasher wire (ground) to black of light wire and red and blue to brown light wire. Kahtec support says that Porsche uses brown for ground and black for hot. So I have it wired backwards? Is this true??? Why the hell would Porsche use brown for ground?? RBC

POST 2Original post

I've found this to be a great brake light addition. Seriously though, Germans have been using brown as ground for decades. It makes sense in the context of "earth" rather than ground...It's just one of those things. Hope you didn't hurt it.

POST 3Original post

When in doubt the Brown wire is always the ground on most EURO vehicles... been that way for years and years...

POST 5Original post

Braun rhymes with Grund..possible. My guess is brown looks like soil/earth.

POST 6Original post

Find a multimeter, set it for 12vDC and test the wires. A digital multimeter will show positive/negative; an analog meter will just peg the needle if you have the polarity wrong. I have the Kahtec unit on my 996 and it works as expected. Did you cut the wire as the Kahtec instructions tell you to? If you used the inline taps but did not cut the wire, you will not have interrupted the circuit, and the Kahtec unit will be bypassed.

POST 7 / ORIGINAL POSTEROriginal post

Yes I cut the brown wire. I have been reading this forum for a couple of years and don't recall the brown ground wire being mentioned. Maybe should be posted in things to know about your Porsche. thanks gents I will rewire in about 3 weeks when I get back from Panama. RBC

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