fullymatted.
Back to search
Rennlist

21 x alarm flashes when locking the car

Add to repair workspace
Open repair workspace
Original source
4 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCH21 x alarm flashes when locking the car

Leading reported evidence

Check doors, consolse etc everything seems

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

I have checked the doors, consolse etc everything seems to be closed and I dont get the beep sound from the horn.

Original post Read captured discussion
21 x alarm flashes when locking the car
Read full discussion summary

Leading evidence: 'Check doors, consolse etc everything seems' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check doors, consolse etc everything seems' (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 1 other evidence results

Replace headunit

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

A few days after I changed my headunit to a aftermarket unit.

Original post Read captured discussion
21 x alarm flashes when locking the car
Frequently discussed actions (2)

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

Check doors, consolse etc everything seems

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 have checked the doors, consolse etc everything seems to be closed and I dont get the beep sound from the horn.

Original post Read captured discussion
21 x alarm flashes when locking the car

Replace headunit

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

A few days after I changed my headunit to a aftermarket unit.

Original post Read captured discussion
21 x alarm flashes when locking the car
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.

  • Rennlist: 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

After this 21 flashes everything goes back to normal.

Original post Read captured discussion

No unique explicit quoted action; no causal link assigned

Generation: 20261027T005001Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

When I lock the car the alarm "indicator" on dash flash 21 times, together with the red lockerswitch-light on dash. After this 21 flashes everything goes back to normal. No beep from the horn. Problem started 1 week ago. A few days after I changed my headunit to a aftermarket unit. I tried to put my old headunit back in but the problem remains. I have checked the doors, consolse etc everything seems to be closed and I dont get the beep sound from the horn. Any ideas what the problem can be? What dose this flashes indicat? Car is a 996 C4 -2000 with PCM(nav, phone, ++), now removed.

POST 2Original post

I bet the radio alarm wire is lose. I think you either have to ground it or keep it from being grounded.

POST 4 / ORIGINAL POSTEROriginal post

Tried to ground, but then I get the beep aswell.. Fault code 21 - W lead (DME - immobiliser), open circuit Possible cause of fault - Short circuit to ground/open circuit in the communication lead between the alarm system control module and the DME control module

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