Kf Laser Hand Brake Lights Comes On Car Goes Off ???

[darrinc]

hi,
can anyone help with a problem i am having with my 91 kf 1.8 efi laser?
as you are driving handbrake light comes on,cd player turns off tacho drops to about 1100 rpm (but car is doing about 2500),loses power and then light goes out and everthing is bcak to normal??
until you turn car off then it won't start and sounds as if battery has gone flat???