Ye so if it's the e-brake then if you use your gymnast skills to lie upside down in the drivers footwell and look at the ebrake, you'll see the wire that plugs into the back of the parking brake assmebly (nearly by the fuse). That switch is pushed in when the e-brake is off, breaking the circuit (that wire is the ground). it sounds like the ebrake cable is a bit loose (same on mine) so its not pulling the mechanism back far enough to push in the switch. That or the mechanism goes too far back and has pushed the switch back over time - it's held in place by 2 metal prongs which can be easily moved backwards and forwards. Hope that helps!
Cheers,
Ray
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