Seat mii sidelight not working

[davidc1]

Hi. one of the side lights on my car works when you have dipped beam on but not on just the side lights. Seems strange. Is first step a new bulb and if no joy look at the fuses? Thanks

[GreenV8S]

I'd check fuses first since they should be easy to access whereas bulbs sometimes aren't.

Is it the exact same lamp element that is working on dipped beam, or just one sharing the same housing/bulb? If it does come on, that proves the lamp itself is OK.

[davidc1]

Thanks for the reply.
Just been out to experiment.
The side bulb is separate from the main headlight bulb.
The bulb works with the ignition off.
But when I prime the ignition/engine on , it works on full headlights but not on side lights... so a bit stumped... the fuse?

[GreenV8S]

Yes, I'd check the fuses. Lighting circuits have got quite complex these days and will probably have multiple fuses controlling the different functions. A blown fuse can lead to the sort of non-obvious behaviour you're getting here. Since you've seen the lamp come on you know the bulb itself is intact.

[davidc1]

got a new bulb from SEAT today , now working. a dual filament bulb... 13quid! thanks for the replies v8.