Porsche Club GB

Help 2 Alarm going off on battery disconnection

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHHelp 2 Alarm going off on battery disconnection

Leading reported evidence

Disconnect negative battery terminal

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

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
Following on from Help 1 when I disconnected the negative battery terminal with a view to charging it the alarm went off and I couldn't work out how to turn it off!
Original post Read captured discussion
Help 2 Alarm going off on battery disconnection

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

Read captured replies

1 matching discussions · 4 captured posts examined · 0 partial discussions

Compare 3 other evidence results

Disconnect without terminal 86 being energised

Performed · outcome unconfirmed

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
The alarm siren has a backup battery inside it, and this powers the siren when the car battery is disconnected without terminal 86 being energised.
Original post Read captured discussion
Help 2 Alarm going off on battery disconnection

Reconnect batt, tried locking and unlocking the doors

Performed · outcome unconfirmed

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
I reconnected the batt, tried locking and unlocking the doors with key and with remote but still the alarm went!
Original post Read captured discussion
Help 2 Alarm going off on battery disconnection

Set siren off if someone tries

Suggestion or failed attempt

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
It is to set the siren off if someone tries to steal your battery.
Original post Read captured discussion
Help 2 Alarm going off on battery disconnection

Frequently discussed actions (4)

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

Disconnect negative battery terminal

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
Following on from Help 1 when I disconnected the negative battery terminal with a view to charging it the alarm went off and I couldn't work out how to turn it off!
Original post Read captured discussion
Help 2 Alarm going off on battery disconnection

Disconnect without terminal 86 being energised

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
The alarm siren has a backup battery inside it, and this powers the siren when the car battery is disconnected without terminal 86 being energised.
Original post Read captured discussion
Help 2 Alarm going off on battery disconnection

Reconnect batt, tried locking and unlocking the doors

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
I reconnected the batt, tried locking and unlocking the doors with key and with remote but still the alarm went!
Original post Read captured discussion
Help 2 Alarm going off on battery disconnection

Set siren off if someone tries

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
It is to set the siren off if someone tries to steal your battery.
Original post Read captured discussion
Help 2 Alarm going off on battery disconnection

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.

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

Porsche Club GB: 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: 20261026T190023Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Following on from Help 1 when I disconnected the negative battery terminal with a view to charging it the alarm went off and I couldn't work out how to turn it off! I reconnected the batt, tried locking and unlocking the doors with key and with remote but still the alarm went! It turned itself off after about 2 minutes but I'm not sure I want to chance it again until I know what I'm doing wrong.

POST 2 / ORIGINAL POSTEROriginal post

Just sorted this one, it appears you have to have key in the ignition and at position 1. (How do they come up with this stuff?)

POST 3Original post

Hi, much easier to buy a charger, Porsche's own or similar. Just plug it in and it will charge up even a flat battery.

POST 4Original post

As you have found, the key needs to be in the ignition. Turn the ignition on, then you can turn it off, but leave the key in place. This leaves the ancillary feed on (terminal 86s). The alarm siren has a backup battery inside it, and this powers the siren when the car battery is disconnected without terminal 86 being energised. Why do they do that? It is to set the siren off if someone tries to steal your battery. Of course, that could only happen if the car was unlocked. If the alarm does go off, you have to switch on the ignition (with the car battery connected) in order to silence it.

This is a source reference. Confirm exact model applicability in the original material.