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Trouble with headlights turning on....

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

Discussion summary

YOUR RESEARCHTrouble with headlights turning on....

Leading reported evidence

Replace light switch and headlights work fine now

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

i replaced my light switch and headlights work fine now.

Trouble with headlights turning on....
Frequently discussed work

Repair needed and outcome

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

I'll follow-up after that just to complete the story on the repair needed and outcome.

Trouble with headlights turning on....
Read full discussion summary

Leading evidence: 'Replace light switch and headlights work fine now' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Repair needed and outcome' (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 · 11 captured posts examined · 0 partial discussions

Compare 3 other evidence results

Repair needed and outcome

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 · Original poster

I'll follow-up after that just to complete the story on the repair needed and outcome.

Trouble with headlights turning on....

Replace light switch out

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

Search thisw thread there are several posts on changing the light switch out.

Trouble with headlights turning on....

Replace switch

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 · Original poster

Since I bought this car only about 3 weeks ago, the dealer is going to test and replace the switch for me at no cost this Thursday morning.

Trouble with headlights turning on....
Frequently discussed actions (4)

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

Repair needed and outcome

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

I'll follow-up after that just to complete the story on the repair needed and outcome.

Trouble with headlights turning on....

Replace light switch and headlights work fine now

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

i replaced my light switch and headlights work fine now.

Trouble with headlights turning on....

Replace light switch out

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

Search thisw thread there are several posts on changing the light switch out.

Trouble with headlights turning on....

Replace 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 · Original poster

Since I bought this car only about 3 weeks ago, the dealer is going to test and replace the switch for me at no cost this Thursday morning.

Trouble with headlights turning on....
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.

11 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: 20261027T025149Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I am having trouble with the headlights coming on when I turn the switch. I have a 2004 C4S cab with the HID/xenon factory lights. When I turn the dial, many times they don't turn on right away. Sometimes I just pull the **** out to turn on the fog lights and push it back in and they come on, but this last Saturday night took almost 5 minutes for them to respond. Once they are on it is no problem. Has anyone ever experienced this or know what the cause might be? Tom in CT

POST 2Original post

its been known to have a problem with the light switch... might need to R&R.

POST 3Original post

Quotes source post: 5917453

+1 this happens to BOTH lights at the same time right? Then switch is suspect, if only one light, them balast would be a good place to look. Search thisw thread there are several posts on changing the light switch out. GL and let us know the outcome

POST 4 / ORIGINAL POSTEROriginal post

Yes, both headlights...but just the headlights. Everything else in the car electrically works fine. Thanks for the advise. I will track down a replacement and let you know if that was the cure..... Tom in CT

POST 5Original post

I had the same problems on my C4. I fitted a new light switch (part number 996 61353500) and everything works perfectly now! Nikos.

POST 6Original post

Quotes source post: 5917560

same with me. i replaced my light switch and headlights work fine now. some have suggested battery as a poss cause, noting how litronics staff off when lacking high voltage. bought switch from sunset for $86. my thread: https://rennlist.com/forums/showthre...ight=litronics thread on Renntech.org DIY help: http://www.renntech.org/forums/index...=742&#entry742

POST 7Original post

Same problem, required a replacement of the headlight switch.

POST 8 / ORIGINAL POSTEROriginal post

Thanks for all the feedback. Since I bought this car only about 3 weeks ago, the dealer is going to test and replace the switch for me at no cost this Thursday morning. I'll follow-up after that just to complete the story on the repair needed and outcome. Tom G. in CT

POST 9Original post

This might helpful until you get it fixed: if the switch is on but the headlights don't shine, sometimes a quick high-beam flash will get them going.

POST 10 / ORIGINAL POSTEROriginal post

Switch was bad. Porsche replaced it at no cost this morning.

POST 11Original post

I love it when I notice her head lights turned on.

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