I've tracked it down to the high level brake light loom, tied to the hinge mechanism in the folding roof. At a certain position of opening, applying the brake pops the brake light fuse, which also powers all the instrument displays on the dashboard and direction indicators. Now I've just got to find where exactly that loom is frayed and decide how best to fix it. Has anyone else found, over the last few years, which bend is the culprit?