Just before setting off on a 250 mile working trip and late as usual I noticed my SatNav charger wasn't working. Pulled it out from the socket and the end had cracked off. These later ones have a plastic screwed retainer that holds a fuze and metal end cap under tension against a spring - which I suspect causes the plastic to crack. Being an idiot I go fishing around for the bits still in the socket, the one in the cubby box between the seat, without switching off the ignition. After some sparks and a smell of burning the sockets don't work; so I conclude I've blown a fuse and carry on.
The next morning in the hotel carpark I consult the handbook, find where the accessory fuze is, actually in the drivers footwell fuzebox, and read that one should get the extracting tool and a spare fuze from the fuzebox under the bonnet. This I do, only to discover the fuze had not blown.
Puzzled I put everything back and start the car. Horror of horrors I now have warning messages 'ABS Fault' and 'Cruise control' and 'DSC not available'. My usual trick of switching off and on again doesn't clear the message, so I drive back carefully on some slushy motorways. Yes the only day we've had anything like snow this winter!
I take the car back to my specialist who puts the diagnostics on the car finds no faults in any of the hardware but a 'Battery Low' error message on several of the units including the ABS brain - which is also involved in the cruise control and DSC functions.
We were puzzled by this, but they have replaced the blown fuzes for the auxillary sockets which are I'm told in the glovebox and boot; although I haven't seen either of them.
At a second visit, we ran out of time on Friday night, the 'Battery low' error was traced to high resistence at a fuze in the engine bay box, which I had probably disturbed when pulling out the extraction tool or the spare fuze.
So please think before doing even the simplest of things - the consequences in complex, old (it's a 55 plate) car can be extreme!
Thanks to the guys at Preston Jag for working methodically through the problem and Merry Christmas all
Mike