A bit of a strange one this..
The brake light on the drivers side has stopped working, while the rest of the lights in the unit are OK.. I've checked (and changed the bulb just in case), The connections to the unit are good and I've checked the wiring up to where it disappears under the seats and thats sound. The fuses are OK and there's no sign of burning or melting on the unit itself..

Have I missed something really basic here, because I'm scratching my head over this one....