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YOUR RESEARCHCar won't crank. - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Leading reported evidence
Check relevant fuses & all ok
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
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0
Unsuccessful attempts
1
Discussions
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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
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Car won't crank. - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Frequently discussed work
Check (
No successful repair reported for this finding.
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Reported fixes
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Unsuccessful attempts
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1
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Suggestion
There is a fuse on the immobilizer that should be checked (disconnect battery), then check the electrical connections and the circuit board inside for signs of water.
Car won't crank. - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Read full discussion summary
Leading evidence: 'Check relevant fuses & all ok' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check (' (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.
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
I replaced my immobilizer and got it resynched to the ECU (ECU doctors out of Florida)....
Car won't crank. - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check (
Suggestion or failed attempt
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 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
There is a fuse on the immobilizer that should be checked (disconnect battery), then check the electrical connections and the circuit board inside for signs of water.
Car won't crank. - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check connector pins again
Suggestion or failed attempt
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 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
If you get any other weird gremlins, you may need to pull it back out and check the connector pins again, cleaning with a brush and contact cleaner if necessary.
Car won't crank. - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check drain holes periodically
Suggestion or failed attempt
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 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.
Car won't crank. - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Frequently discussed actions (10)
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Check (
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
There is a fuse on the immobilizer that should be checked (disconnect battery), then check the electrical connections and the circuit board inside for signs of water.
Car won't crank. - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check connector pins again
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
If you get any other weird gremlins, you may need to pull it back out and check the connector pins again, cleaning with a brush and contact cleaner if necessary.
Car won't crank. - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check electrical connections and the circuit board inside
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
There is a fuse on the immobilizer that should be checked (disconnect battery), then check the electrical connections and the circuit board inside for signs of water.
Car won't crank. - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Clean with a brush and contact cleaner if necessary
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
If you get any other weird gremlins, you may need to pull it back out and check the connector pins again, cleaning with a brush and contact cleaner if necessary.
Car won't crank. - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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.
14 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
986Forum: 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: 20261026T113718Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Started he up this morning & drove her out the garage to do some work on her.
This afternoon:
1) Ignition on all good battery ok.
2) Turn key & nothing. No dimming of ignition lights.
3) Won't roll start
4) Drivers side window stays extended when door open
5) Checked all relevant fuses & all ok
6) Removed battery terminal for 5 mins & reconnected...no change.
Got me stuffed atm
Classic symptoms of immobilizer damage (usually water infiltration). Your blown C3 fuse also points to this.
Feel under the seat for moisture. There is a fuse on the immobilizer that should be checked (disconnect battery), then check the electrical connections and the circuit board inside for signs of water.
You'll need to disconnect the battery to unbolt the seat and visually check the immobilizer and its fuse. If you do find signs of water damage, you'll need to find a repair shop in the Land of Oz or ship it off to the US (ECU Doctors, $500-ish for the repair).
Another possibility is the ignition switch, which is a cheap and easy fix. You should probably order or pick one up from your local auto parts store so it can be eliminated. It's a 10-15 min job and they run about $20 in the US.
It should probably be replaced either way as it is low cost and a common point of failure.
To add to this, take the immobilizer apart and look inside for corrosion. It's just snapped together. There's also no need to remove the seat to get to it. I also agree with Charles that I would suspect the ignition switch second, followed by the clutch safety switch third.
Removed the immobilizer....top of circuit board looked fine....underside had small patch of water damage corrosion (green oxidization) which I cleaned up with metho & a toothbrush.
Reinstall & she starts up like normal.
Thanks for all your help & comments it really got me out of a pickle.
This forum is awesome.
Great news! If you get any other weird gremlins, you may need to pull it back out and check the connector pins again, cleaning with a brush and contact cleaner if necessary.
Is there a way to pull the connector pins out to clean them? I took the connector out and scrubbed it, but not sure I got all the crap out... I replaced my immobilizer and got it resynched to the ECU (ECU doctors out of Florida)....
Now my windows wont work and car still wont crank. I have not replaced the ignition switch or clutch safety switch, but before doing that I wanted to make sure there wasnt some kind of issue with the connector... I have new pins, and might want to just replace them and repin... just not sure what to do, since it does look fairly clean now.
so frustrating
