quick brake light question

[mikojh]

Got a non working brake light here well sort of, obviously most likely the bulb. There is something wierd which ive never come across before happening though. Basically when i noticed the back light wasnt working the brake light however was when pressed. Looked at the bulb today to see if it was black and put it back in and the back light or brake light was permant on with no brake light when pressed. and when taken out and turn the bulb around to the opposite way then the light would be permanently off with the brake light working as it was originally, is this just the workings of a dodgy bulb, seems a little odd.

[neil.]

It's a dual filament bulb, by turning it around you basically turned the brake light filament into the tail light one (which has blown). Time for a new bulb.
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CBT February 2008 | A2 June 2008 | Yamaha YBR125 (written off) | Honda CBF125 (current)

[mikojh]

nice quick service there mate thanks. so nothing unusual then quite normal?

[Raffles]

I'm surprised that you were able to reverse the orientation of the bulb. A 21w / 5w stop and tail light bulb usually has a stepped bayonet fixing that prevents this.
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A good loser will always be a loser.

[mikojh]

en 125 its an import could be that maybe?

the bulb is "ring 12v-P21/5W 2K2".