Originally Posted by
Mike Kerbey
I had this problem, checked everything and then I gave the wiring loom down by the reverse light switch on the gearbox a tug and made it rest in a different position and its never done it since!
Most likely it was shorting on the gearbox, something which can only happen when the ignition is on as it has no power without this. I suspect it is when the car is reversed rather then it blowing overnight.
Martin