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Headlamp flickers at start up

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHHeadlamp flickers at start up

Leading reported evidence

Replace 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
I had similar symptoms on mine so replacing the switch fixed it.
Original post Read captured discussion
Headlamp flickers at start up
Outcome qualification: Negation, uncertainty or missing explicit repair resolution overrides the raw extraction signal.

Frequently discussed work

Check alternator/battery voltage

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 your alternator/battery voltage when you first turn on the lights.
Original post Read captured discussion
Headlamp flickers at start up

Read full discussion summary

Leading evidence: 'Replace switch' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check alternator/battery voltage' (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 3 other evidence results

Check alternator/battery voltage

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
Check your alternator/battery voltage when you first turn on the lights.
Original post Read captured discussion
Headlamp flickers at start up

Replace over their life

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
HID bulbs lose intensity and the color changes over their life.
Original post Read captured discussion
Headlamp flickers at start up

Use some electrical help

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
Could use some electrical help.
Original post Read captured discussion
Headlamp flickers at start up

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.

Check alternator/battery voltage

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 your alternator/battery voltage when you first turn on the lights.
Original post Read captured discussion
Headlamp flickers at start up

Replace over their life

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
HID bulbs lose intensity and the color changes over their life.
Original post Read captured discussion
Headlamp flickers at start up

Replace 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
I had similar symptoms on mine so replacing the switch fixed it.
Original post Read captured discussion
Headlamp flickers at start up
Outcome qualification: Negation, uncertainty or missing explicit repair resolution overrides the raw extraction signal.

Use some electrical help

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
Could use some electrical help.
Original post Read captured discussion
Headlamp flickers at start up

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 · 1 adjusted by outcome qualification.

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

Generation: 20261026T052503Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hello RL'ers, Could use some electrical help. My headlights are slow to turn on. Typically, there is a few seconds (2-60) of no light, flickering light, then both come on. Pulsing high beams sometimes get the lights to kick on. Once on, no problems. Fuses are ok so my next suspect is the relay. Advice? - where is the relay located? - other experience, suggestions? 2001 with Bixenon. TIA George

POST 2Original post

A flickering HID bulb is often a sign of impending bulb failure. Have you ever changed them, or are they the original bulbs? If you do change them, always do it in pairs. HID bulbs lose intensity and the color changes over their life. I put new bulbs in my C4S a few months ago and the difference was dramatic.

POST 3Original post

I wonder if the ballast is going out??

POST 4 / ORIGINAL POSTEROriginal post

No HTwo O. Where is the ballast?

POST 5Original post

Quotes source post: 9247032

Sorry, not sure. Somewhere in the wire harness for the lights.

POST 6Original post

It could also be the headlight switch. I had similar symptoms on mine so replacing the switch fixed it. Try banging on the switch when it is flickering - if it works then you know its the switch and not the lights. Easy fix and relatively inexpensive too.

POST 7Original post

Check your alternator/battery voltage when you first turn on the lights. The alternator may not bring up a weak battery enough to help "pop" the lights on. I think the ballasts are on the light assys.

POST 8Original post

The ballast is in the light assembly, right behind the bulb.

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