I have a 2001 Galaxy tdi which has decided it likes to switch its hazards on erratically while driving along. The obvious connections have been checked by garage and are all sound and dry. All was well for a few days then it all started again. Switching the Air con on stopped the flashing for this particular journey (discovered by accident!!), but can't get problem to happen again so that garage can investigate further. Suspect it may be a broken wire somewhere - but where do we start looking!! Any idesa??