the "low brake fluid" light comes on for a few seconds them back off. on 1999 Jaguar XK8

this happens although the resivior is full.
i unplugged the wire to the switch and the light stayed on. so i then put a jumper across the plug and i though that worked. but a few days later it come on again!
is this also a computer program problem??


Asked by for the 1999 Jaguar XK8