Probably not the same thing but,
Once my 34 went completely dead at a set of traffic lights. Engine stopped, no power to any electrics including my hazard lights so pretty much packed my dacks cos it was night time on main north road.
Anyway had to push it up on the kerb cos it wouldnt start, like there was just nothing.
RAA came and screwed around with it for bout an hour and it was where the battery connects to the engine or something. They had lost contact.
Got it started but ever since then my tacho hasnt worked.