On 20/11/2017 13:07, Jim GM4DHJ ... wrote:
lost a dippd beam bulb the other day .....only knew by the reflection from
the car in front....I thought canbus was supposed to warn you of this....or
is it just another digital thing that doesn't work properly ? .....



were you still able to use main beam ?.

My astra H lost its offside main-beam bulb so the ECU refused
to allow any use of main beam at all, presumably to force
the driver to investigate.