Hi there, Octavia 1.6tdi 12 plate estate. Got a weird one. Bulb blown light is on but no bulbs are blown. None seem dim or different. Haven't replaced any recently and its only on sometimes. There all standard halogen bulbs (no LED etc) Its a bit random. Sometimes its on when car is started other times it appears after driving for a few miles and sometimes not on at all. Even remembered to check high level brake light this time including reversing lights. Could it be a failing bulb?

Any thoughts welcome.

Alasdair

Check for corrosion on the earth (brown wire) loom connector contacts or cluster pin that it goes onto, both rear clusters.

Cheers Pete will do. It came on just as I came home today after being off into and out of town (10miles plus one stop) and checked every bulb before I switched off car and they all seemed bright and ok. A poor/loose earth would change the resistance so would put warning on. Will check the rear clusters out.

Alasdair

Just been out to check bulbs/wiring again in case I missed one. Slammed rear tailgate and number plate light went out momentarily so reckon its the culprit. Didn't think the system covered them plus I have to admit never checked them when warning light was on. Will investigate further when weather gets better. Blowing a gale at the moment.

Thanks again

Alasdair

Hoping it's just a no. plate bulb for you.

On our 59 plate estate we had bulb warning on randomly........ eventually the LED high level stop light failed. I replaced it with an eBay job (there's loads advertised) but the fit around the hole in the tailgate wasn't great, however it's replacement did sort out the bulb warning.

👍

Mine was another one with corrosion on one of the bulb contacts on the rear number plate light.