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Help - weird electrical issues

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8 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHHelp - weird electrical issues

Reported or suspected cause

rust or corrosion

Reported cause

No successful repair reported for this finding.

1
Identified cause
0
Suspected cause
0
Reported fixes
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 report identifying a cause
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.

Reported cause

I assume it was due to rust or corrosion.

Help - weird electrical issues
Frequently discussed work

Check battery terminals (do they need

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

Remove and reseat the fuses for the effected components), check battery terminals (do they need cleaning ?), what is voltage reading when car is off and car is running (should be just under 14V running).

Help - weird electrical issues
Read full discussion summary

Leading evidence: 'rust or corrosion' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'rust or corrosion' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check battery terminals (do they need' (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 · 8 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Check battery terminals (do they need

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

Remove and reseat the fuses for the effected components), check battery terminals (do they need cleaning ?), what is voltage reading when car is off and car is running (should be just under 14V running).

Help - weird electrical issues

Check condition of the connection there

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

On early cars I heard there was issue with ground strap under the passenger side of the engine (you could check the condition of the connection there for corrosion and clean if necessary - I think a search of the forums will show you a picture of that - I found it quite easily on my car)

Help - weird electrical issues

Clean ?), what is voltage reading

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

Remove and reseat the fuses for the effected components), check battery terminals (do they need cleaning ?), what is voltage reading when car is off and car is running (should be just under 14V running).

Help - weird electrical issues

Run (should be just

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

Remove and reseat the fuses for the effected components), check battery terminals (do they need cleaning ?), what is voltage reading when car is off and car is running (should be just under 14V running).

Help - weird electrical issues
Frequently discussed actions (6)

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

Check battery terminals (do they need

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

Remove and reseat the fuses for the effected components), check battery terminals (do they need cleaning ?), what is voltage reading when car is off and car is running (should be just under 14V running).

Help - weird electrical issues

Check condition of the connection there

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

On early cars I heard there was issue with ground strap under the passenger side of the engine (you could check the condition of the connection there for corrosion and clean if necessary - I think a search of the forums will show you a picture of that - I found it quite easily on my car)

Help - weird electrical issues

Clean ?), what is voltage reading

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

Remove and reseat the fuses for the effected components), check battery terminals (do they need cleaning ?), what is voltage reading when car is off and car is running (should be just under 14V running).

Help - weird electrical issues

Run (should be just

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

Remove and reseat the fuses for the effected components), check battery terminals (do they need cleaning ?), what is voltage reading when car is off and car is running (should be just under 14V running).

Help - weird electrical issues

Run )

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

Remove and reseat the fuses for the effected components), check battery terminals (do they need cleaning ?), what is voltage reading when car is off and car is running (should be just under 14V running).

Help - weird electrical issues

Run while) and the durametric showed 13.8v at idle

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 · Original poster

The battery was showing 12.4V static (a bit low, but I have not been on a long run for a while) and the Durametric showed 13.8V at idle.

Help - weird electrical issues
Reported and suspected causes (1)

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

rust or corrosion

No successful repair reported for this finding.

1
Identified cause
0
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that report identifying a cause
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.

Reported cause

I assume it was due to rust or corrosion.

Help - weird electrical issues
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.

8 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

Problem solved!

No unique explicit quoted action; no causal link assigned

Generation: 20261027T035758Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

The oddest thing just happened. As I pulled out of the driveway, the brake wear light came on. I thought thisa bit odd as the pads only have about 15K miles on them. But as I had washed the car this morning, I thought perhaps it might be a short caused by water (odd though as I had driven 50 miles this morning after washing the car). A couple of minutes later the low coolant light started to blink (odd as the expansion tank is brand new). Finally, as I am frantically taking the car home as quickly as possible, I note the rear spoiler has deployed even though I never got over 45 mph. Get the car home and inspect. Coolant level is fine, right at the max line. I manually lowered the spoiler with the swtch with no issues. Started the car back up and voila, no idiot lights at all. Anyone have any ideas what might have happened? Thanks

POST 3Original post

I don't know if this applies to the 996, but in the Cayenne a failing battery will cause strange electrical behavior. How's your battery?

POST 4 / ORIGINAL POSTEROriginal post

Battery is new last year. But maybe water got in, so I will verify.

POST 6Original post

My brake sensors are "wired back" and about 2 months ago, I had one "go off". I assume it was due to rust or corrosion. I cut the wires and soldered them together. Problem solved!

POST 7Original post

Multiple random issues like this point to bad ground. As previous poster said, ignition switch could be culprit - should be cheap and easy to replace, but first check fuse box area (any signs of water getting in the car ? Remove and reseat the fuses for the effected components), check battery terminals (do they need cleaning ?), what is voltage reading when car is off and car is running (should be just under 14V running). On early cars I heard there was issue with ground strap under the passenger side of the engine (you could check the condition of the connection there for corrosion and clean if necessary - I think a search of the forums will show you a picture of that - I found it quite easily on my car)

POST 8 / ORIGINAL POSTEROriginal post

Spent a bit of time tinkering today. I did discover that the coolant level cold was about 300ml low, but I don't think that would trigger a blinking light (especially as it was at the max line hot). I wonder if the blinking was actually an engine compartment fan error? And perhaps then the issue was in the rear electrical harness (engine compartment fan, spoiler and rear pad sensor). My Durametric revealed no codes. The battery was showing 12.4V static (a bit low, but I have not been on a long run for a while) and the Durametric showed 13.8V at idle. I was not able to replicate any of the issues and put about 40 miles on the car doing errands with multiple stop starts. Spoiler operated fine, no evidence of coolant loss and no issues with brake sensors. I will monitor and see if anything happens again.

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