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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHMOT failure .. neither position lamp is working :-(
Reported or suspected cause
straighforward
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
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MOT failure .. neither position lamp is working :-(
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Leading evidence: 'straighforward' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'straighforward' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check bulbs' (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.
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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.
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MOT failure .. neither position lamp is working :-(
Check fuses a3 and a4, all good
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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Discussions that performed work without a confirmed outcome
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Performed · outcome unconfirmed · Original poster
I removed the headlight units and resetaed them, and checked the fuses A3 and A4, all good.
MOT failure .. neither position lamp is working :-(
Install on
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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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.
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Performed · outcome unconfirmed
Make sure the yellow clamp in the cradle at the back is fitted on to the pleg correctly and holding it firmly in the cradle.
MOT failure .. neither position lamp is working :-(
light unit is not plugging in
Suggestion or failed attempt
No successful repair reported for this finding.
0
Identified cause
1
Suspected cause
0
Reported fixes
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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 suspect a cause
1
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suspected cause
Most likely the light unit is not plugging in to the socket properly on the rear of the light unit.
MOT failure .. neither position lamp is working :-(
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.
14 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
911uk: 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: 20261026T091943Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Frustratingly my 996 has just failed on neither sidelight working. I didn't even think to check them when I did all the other checks! I removed the headlight units and resetaed them, and checked the fuses A3 and A4, all good.
Very annoying as there weren't even any advisories! If I can fix it by tomorrow it'll get passed free of charge, so any suggestyions very welcome!!
I don't think it's the switch becuase the dash backlight and instrumet lights come on when I turn to position 1 on the light switch. That's where the position l;ights should come on apprently/
I take it you checked the bulbs?
Most likely the light unit is not plugging in to the socket properly on the rear of the light unit. Make sure the yellow clamp in the cradle at the back is fitted on to the pleg correctly and holding it firmly in the cradle. If they ever don't plug in properly, the side lights don't come on. Whilst trying it make sure your side light switch is turned on so you see the bulb illuminate when you push it in.
One of my yellow clamps was dicky, so I used to be able to slide a thin bar (I used a long barbeque stewer) just up between the side flasher and wheel liner and hold it against the back of the plug whilst you insert the light unit back in to guarantee it pushed in and connected properly. It can be a 2 man job doing that though. If you look through where your headlight unit goes, you'll see a small gap where the side flasher and wheel liner are - put your prodder through there if you try that.
Just a bit embarrassing ... though to be fair one side was a blown bulb, the other side was the loose connector as Alex suggested. I just immediately assumed something more complex as they were both dead.
No harm done though, as it was a free retest and an excuse to drive in the countryside with the roof down!
Umm just picking up on this, my light isn't working bulbs check swapped with working one and still not working. Checked fuse all fine.
Usually straightfoward but I just have no idea what else to test. Need this working before MOT. Any help would be appreciated. 996 c4s. Bulb in question
best thing is to just trace the wires back to the next connection and see where the power returns. It would be easy enough to simply run another wire if you need to get it through the MOT
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