So I got the usual PSM / ABS light for no apparent reason. The warning lights only came on when I switched my headlights on (even in the side light position). Swapped out the brake pedal switch as a cheap experiment - didn't fix it. Pulled the tail light pods and noticed that both filaments of the tail/stop light bulbs on both sides were lit when the headlights were on (but no foot on the brake pedal). and here's what I found... one of the OEM Hella bulbs had gone bad and the internal filament mounts had welded themselves together on one side causing a short between the tail/stop circuits - wow I thought! Anyway, new bulb fixed it of course. Thought it might help someone in the future as the other Hello tail/stop bulb in my car was also heading this way so obviously a systematic problem. I guess it trips the computer in some way. Have a nice day
Discussion summary
YOUR RESEARCHPSM / ABS warning light on - Solution! (in my case)
1 matching discussions were examined; no attributable action/outcome evidence was detected. No consensus or repair conclusion is claimed.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Read captured repliesInsufficient extracted evidence does not mean there is no answer in the original discussions.
1 matching discussions · 3 captured posts examined · 0 partial discussions
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.
3 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.
2 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
Swapped out the brake pedal switch as a cheap experiment - didn't fix it.
No unique explicit quoted action; no causal link assigned
Generation: 20261027T003124Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Good to know. Thanks for sharing!
Great catch! Nice that you have given others the benefit of it.
This is a source reference. Confirm exact model applicability in the original material.