Did you know?

[nine-fiver]

Just replaced the bulbs in the back of the car.
All 21W single post lamps. Interesting thing, though. Both bulbs run at 5 Watts per side when the lights are on. Put the brakes on and the outer lamps then run at 21Watts. Most other cars would run a double filament bulb with two circuits to do this. The 9-3 doesn't. And when one bulb fails the other one cleverly takes up the job of the missing one. Rather clever.

[Audax]

And when one bulb fails the other one cleverly takes up the job of the missing one. Rather clever.

I have had a garage phone me up once and say "we've got a 9-3 in for MOT and it's passed apart from the lights are doing something weird can we send it to you for a look?" turned out that yes, quite simply one of the bulbs had failed.

[wrighar]

indeed, it uses PWM to reduce the 21w bulb down to 5w brightness.

means that if a bulb fails, it can make another one do that job(s) instead.

[phoenix]

Vectras from about MY03 do the same...

[Geoff1951]

...do you think they might be related?

[nine-fiver]

You have to wonder who did the work on that system. Saab engineers or their colleagues at GM...