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99 c2 manual won't start

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

Discussion summary

YOUR RESEARCH99 c2 manual won't start

Leading reported evidence

Check fuses, all good

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 checked fuses, all good.

99 c2 manual won't start
Frequently discussed work

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

Check/replace ignition switch.

99 c2 manual won't start
Read full discussion summary

Leading evidence: 'Check fuses, all good' (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.

Read captured replies

1 matching discussions · 17 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Check starter relay

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 then checked the starter relay under the rear carpet.

99 c2 manual won't start

Replace ignition switch, no start

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 changed the ignition switch, no start.

99 c2 manual won't start

Replace ok so the ignition switch

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

Ok so the ignition switch was replaced, and car still does not start.

99 c2 manual won't start

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

Check/replace ignition switch.

99 c2 manual won't start
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

Check/replace ignition switch.

99 c2 manual won't start

Check clutch pedal switch

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

I agree with checking clutch pedal switch.

99 c2 manual won't start

Check cranking

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

First thing I would try with a no cranking is go underneath and on the clutch pedal is a micro switch with two wires, pull them off and connect them together and check cranking.

99 c2 manual won't start

Check fuses, all good

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 checked fuses, all good.

99 c2 manual won't start

Check start lock relay

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

fuses C1, C2, B8 also check start lock relay

99 c2 manual won't start

Check starter relay

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 then checked the starter relay under the rear carpet.

99 c2 manual won't start

Replace ignition switch

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

Check/replace ignition switch.

99 c2 manual won't start

Replace ignition switch, no start

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 changed the ignition switch, no start.

99 c2 manual won't start

Replace ok so the ignition switch

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

Ok so the ignition switch was replaced, and car still does not start.

99 c2 manual won't start

Test )

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

(I keep several spares on hand for testing)

99 c2 manual won't start
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.

17 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: 20261026T155324Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

99 c2 won't start. The lights to interior are on. Clutch is pushed in all the way. When I turn the key, there is no sound at all. No loss of lights. Nothing. It isn't the battery since I took one from my other car and tried that. So what would be the next step? Is there a certain relay or fuse to check? If so which and where is it located?

POST 2Original post

First thing I would try with a no cranking is go underneath and on the clutch pedal is a micro switch with two wires, pull them off and connect them together and check cranking. Myself I don't like having a clutch switch at all and leave it off so I can start without the clutch and prevent thrust bearing wear.

POST 3Original post

Is your floorboard wet under your driver�s seat? I agree with checking clutch pedal switch. Check/replace ignition switch. RockAuto is good cheap source. https://www.rockauto.com/en/catalog/...er+switch,4700 (I keep several spares on hand for testing)

POST 4 / ORIGINAL POSTEROriginal post

I did the switch bypass. Put a 5 fuse between. Nothing. Connected them together directly, still nothing. What's next?

POST 5Original post

Next thing to check is what Tex mention above.

POST 6Original post

Quotes source post: 18316229

fuses C1, C2, B8 also check start lock relay

POST 7 / ORIGINAL POSTEROriginal post

I ordered the ignition switch last night. Will be here Tuesday.

POST 8 / ORIGINAL POSTEROriginal post

The saga continues. Ok so the ignition switch was replaced, and car still does not start. Are the fuses and relays the next item? This is so weird. As all that had changed is the battery was disconnected and connected.

POST 9Original post

jump the starter relay, its under the back seat. On my 2004, it was relay #7

POST 10 / ORIGINAL POSTEROriginal post

Ok I found a relay chart. Is there another relay I could use to check to see if the one installed is bad?

POST 11Original post

Quotes source post: 18324758

remove the starter relay and jump with a piece of wire. I believe its from terminal 30 to 87? Make sure that ignition switch is turned to ON. I did it a handful of times when I was working on my transmission swap. Just make sure the car is not in gear!

POST 13Original post

Quotes source post: 18324765

yeah, jump between pin 30 and 87 on relay panel. You will have to turn key to start position. Or swap relay for secondary air with the start lock.

POST 14 / ORIGINAL POSTEROriginal post

Problem solved. I changed the ignition switch, no start. Bypassed clutch switch, no start. I checked fuses, all good. I then checked the starter relay under the rear carpet. I took the relay next to it, and switched them. Car started. I should have known owning a 928s4, relay relay relay...... Ordering part number 996 615 110 00 Thank you for all that made suggestions on helping me out.

POST 15Original post

Hello All, Can anyone provide a link to the relay diagram / location chart?

POST 16Original post

Good afternoon, Can you share the relay chart? I have a 1999 996 C4 Convertible Thanks, Kirk

POST 17Original post

here you go, file attached. Scroll towards the bottom. I did this for my 2004 C4S

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