Pete i think that you will only find the speed brakes extended light on the 6-7-800 aircraft (900 ?) it is on in flight when the the speed brake lever is beyond the armed position AND te flaps extended more than 10, or rad alt less than 800ft.
On the ground if the speed brake lever is in the down position and the ground spoilers are deployed.
[ 06 September 2001: Message edited by: A and C ]