Today I was driving the car when the seatbelt warning chime went off (both belts were fastened). At the same time I noticed that a lot of the other electrics also went funny - only the sidelights would come on rather than full headlights, the roof controls weren't working, and the indicator wasn't making the tick noise (but the lights were flashing). It was still doing the same after being switched on and off. Disconnecting the battery a couple of times and restarting eventually seems to have cleared it back to normal but does anyone have any idea what might be causing this sort of problem?