Planet-9

Head unit illumination only works in ACC mode

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YOUR RESEARCHHead unit illumination only works in ACC mode

Leading reported evidence

Install head unit in my 987

Performed · outcome unconfirmed

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Unsuccessful attempts: 1
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Performed · outcome unconfirmed
I recently installed a new head unit in my 987.1, and I spliced into the cigarette lighter light (small white wire with red stripe) for the illumination signal.
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Head unit illumination only works in ACC mode

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Leading evidence: 'Install head unit in my 987' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Install head unit in my 987' (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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1 matching discussions · 1 captured posts examined · 1 partial discussions

Frequently discussed actions (1)

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Install head unit in my 987

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 recently installed a new head unit in my 987.1, and I spliced into the cigarette lighter light (small white wire with red stripe) for the illumination signal.
Original post Read captured discussion
Head unit illumination only works in ACC mode

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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.

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

Planet-9: 1 discussions

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

POST 1Original post

I recently installed a new head unit in my 987.1, and I spliced into the cigarette lighter light (small white wire with red stripe) for the illumination signal. However, now I have this odd set of results: ACC + Headlights OFF: cigarette light OFF, screen BRIGHT ACC + Headlights ON: cigarette light ON, screen DIM (expected) Ignition + Headlights OFF: cigarette light OFF, screen BRIGHT Ignition + Headlights ON: cigarette light ON, screen BRIGHT (not expected) Additionally, when I start in ACC mode with headlights and then start the engine, the screen stays dim. However, when I turn the headlights off and on again, the screen will still be bright. Has anyone else encountered this? Is this likely to be an issue with the head unit or the wiring?

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