7 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHpossible bad headlight switch?
Leading reported evidence
Replace parking bulb, one of my headlights did not come
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
When I changed my parking bulb, one of my headlights did not come on either.
Leading evidence: 'Replace parking bulb, one of my headlights did not come' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check functions of the headlights' (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.
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.
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.
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.
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.
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.
1 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
Pulled the lights to inspect and changed out the bulbs while I was in there and all is good now, so likely bad bulb but I may have just jiggled the right wire also.
Can a bad headlight switch cause only 1 headlight to come on?
or should i focus my efforts on the headlight assembly?
car is an '03, factory lights, all other lights come on, the high beam comes on when you flick the lever, and the small bulb when you turn on the switch. Driving/fog lights also work fine
could the bulb be bad? or ballast?
I'm hoping something simple, but this a Porsche after all
Thanks
Brent
I've been tracing almost the exact issue for two months now with no success, try the following:
1- Check the light bulb
Maybe it's just that simple, swap both and see.
2- Check all fuses
even if they are not related to lights, I found some of them busted, others weren't but will effect the light in a way or another. Utilize current draw test to see if there is an electrical current flowing to lights or not.
3- Check the functions of the headlights
Disconnect the headlight unit from the car, with 12V small battery test the pins in the main connector and see if the light come on or not
4- Check ground points
I found some of them were loose, tightening them solved other issues but might work for you.
5- Replace ignition switch
It's significantly cheaper than the light switch, and known to cause weird electrical issues.
6- Clean / Replace light switch
Clean your switch with electronics connector, or you might just buy a new one.
These were the diagnoses steps I did so far, I organized them from easiest to hardest in my opinion. I had other plans to test the harness but sadly my engine gone few days ago.
Hope that helps you find the issue.
I was having issues blowing various bulbs in both headlight assemblies until I spent a few hours taping up a bunch of wires where the insulation was melted/deteriorated. Bulbs last a LOT longer now.
Pulled the lights to inspect and changed out the bulbs while I was in there and all is good now, so likely bad bulb but I may have just jiggled the right wire also. We’ll see if it happens again soon, then I need to trace wires
When I changed my parking bulb, one of my headlights did not come on either. I just reinstalled and everything worked fine. I must have not had the connection "just right". Was very careful aligning when inserting the headlamp assembly.
This is a source reference. Confirm exact model applicability in the original material.
