I blew a fuse in the Land Rover, entirely my fault. A terminal broke off the back of the voltage regulator, so I replaced the feed to the instrument cluster by running a cable from my 12V stabilised power supply to the instruments instead. Unfortunately, this was all I did. I lift the existing supply cable behind the dash, still with broken terminal protruding from the insulated crimp. I imagine that this had touched something that was grounded/earthed and shorted out, blowing the fuse. At least I hope this is why the fuse blew.
Interesting how the wire has melted back where I guess it arced across the gap as the gap formed. Also interesting how it burned a line into the paper.