Hi there, the "handbrake on" warning light comes on randomly while driving. I check the handbrake isn't on, test the brakes. Nothing I seem to be doing is making the light go on/off it just comes on, sometimes flickers, sometimes stays on for about a minute then goes off. Some friends tell me it could be a loose connection with wiring, the brakes themselves appear to be working fine. Do I need to get it checked?