Planet-9

Turn the key on with no engine

Add to repair workspace

New repair projectOpen repair workspace

Original source

4 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHTurn the key on with no engine

Leading reported evidence

Run fans hard, just in case

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
Fans running high makes sense - the car doesn't know the engine temperature so default is to run the fans hard, just in case, to prevent overheating.
Original post Read captured discussion
Turn the key on with no engine

Read full discussion summary

Leading evidence: 'Run fans hard, just in case' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Run fans hard, just in case' (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 · 1 partial discussions

Compare 2 other evidence results

Test rather than

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
For things like radio and window, it might be better to just feed it some external 12v power for installation/testing rather than use the ignition key.
Original post Read captured discussion
Turn the key on with no engine

Use ignition key

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
For things like radio and window, it might be better to just feed it some external 12v power for installation/testing rather than use the ignition key.
Original post Read captured discussion
Turn the key on with no engine

Frequently discussed actions (3)

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

Run fans hard, just in case

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
Fans running high makes sense - the car doesn't know the engine temperature so default is to run the fans hard, just in case, to prevent overheating.
Original post Read captured discussion
Turn the key on with no engine

Test rather than

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
For things like radio and window, it might be better to just feed it some external 12v power for installation/testing rather than use the ignition key.
Original post Read captured discussion
Turn the key on with no engine

Use ignition key

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
For things like radio and window, it might be better to just feed it some external 12v power for installation/testing rather than use the ignition key.
Original post Read captured discussion
Turn the key on with no engine

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.

Planet-9: 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: 20261026T105141Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

Any reason I can't connect the battery and turn the key on with no engine in the car? I've got a while to wait for my case and heads to come back, and there's stuff I'd like to do that will require battery power. Stereo, needs a window regulator, etc. The ECU is completely disconnected. Any body modules gonna freak out and explode or something?

POST 2Original post

I don't think you would damage anything, but it would most likely trigger a whole bunch of error codes. You can always clear those, of course. Depending on what you've removed, power may not go to where you want it if the computer is not there telling the car everything is good to go. For things like radio and window, it might be better to just feed it some external 12v power for installation/testing rather than use the ignition key.

POST 3Original post

Just to close this out in case anyone else is wondering. I hooked it up and turned it on and every alarm bell, whistle, and failure light in the vehicle came on and yelled at me for my actions. Oddly, the radiator fans turned on and went straight to 11. Full blast and LOUD. I'll probably disconnect them before I do it again, they'll suck the battery down quick the way they were running. But everything worked and nothing seems to have self destructed.

POST 4Original post

Fans running high makes sense - the car doesn't know the engine temperature so default is to run the fans hard, just in case, to prevent overheating. Good to know things powered up, but the bigger question will be what happens when you get everything back together - will the systems auto-reset, or will you have to reset them somehow? Be prepared with a PIWIS or Foxwell or similar to get the resets done, because they may not happen automatically...

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