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Terminal 86 S not detected

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHTerminal 86 S not detected

Leading reported evidence

Check fuses

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
Like i said in your other thread....check all the fuses.
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Terminal 86 S not detected

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Leading evidence: 'Check fuses' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check fuses' (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 · 7 captured posts examined · 0 partial discussions

Compare 2 other evidence results

Replace reverse light switch since it wasn't working

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 · Original poster
So I wanted to change the reverse light switch since it wasn't working on my 01 C4, did that and now the car won't start.
Original post Read captured discussion
Terminal 86 S not detected

Test fuses

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
Test all fuses with a "test light"....quick and easy ....you probably just blew a fuse messing with things...
Original post Read captured discussion
Terminal 86 S not detected

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.

Check fuses

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
Like i said in your other thread....check all the fuses.
Original post Read captured discussion
Terminal 86 S not detected

Replace reverse light switch since it wasn't working

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
So I wanted to change the reverse light switch since it wasn't working on my 01 C4, did that and now the car won't start.
Original post Read captured discussion
Terminal 86 S not detected

Test fuses

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
Test all fuses with a "test light"....quick and easy ....you probably just blew a fuse messing with things...
Original post Read captured discussion
Terminal 86 S not detected

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.

7 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.

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261027T084359Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

So I wanted to change the reverse light switch since it wasn't working on my 01 C4, did that and now the car won't start. Lights up like normal but won't crank. Hooked up the Icarsoft and "Terminal 86 S not Deteced" and "Alarm system fault" are what comes up. Any idea what Terminal 86 S stands for? Any idea how to fix it?

POST 2Original post

Terminal 86S is DIN 72552 automotive speak/standard for the +12V feed to the alarm relais' coil.

POST 3 / ORIGINAL POSTEROriginal post

I'm being told it could be associated with the ignition switch as well? Any idea where the alarm relay is located?

POST 4Original post

Test all fuses with a "test light"....quick and easy ....you probably just blew a fuse messing with things...

POST 5Original post

Like i said in your other thread....check all the fuses. Its E-1 btw per the Bentley Manual. It is fed through the ignition lock

POST 6 / ORIGINAL POSTEROriginal post

Turns out it was a bad ignition switch. All fixed and back on the road!

POST 7Original post

Quotes source post: 19868704

Yea i thought that would be a possibility thats why i added that last line in the previous post. Nice repair.

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