Hopefully some people are still subscribed to this thread. Just picking up on the 'bulb out' warning light issue through this thread.
My dash shows I have a bulb out on my 2001 156SW only when the lights are not on? Sidelights, or main lights on and the warning light will disappear. It is not on when braking either.
I have checked, glove box light and all internal lights in the cabin (I think).
I know the dash and dials are lit up when you are not using your lights, and dim slightly when you have your lights on, all of these appear to be working normally, unless I have missed any?
Any other tips on lights to check and which are on the loop to get a bulb out warning?