Well, that's both the 12v accessory sockets in the truck given up the ghost after lamping for a few hours. Both times it's a connecting wire in the socket itself that melts, which I'll easy repair. I shall now set about fitting a hardier socket with a proper connection capable of sustaining the current draw without generating so much heat. Using a Lightforce 170 with an as fitted cigar lighter plug, but I feel some modifications coming on. Last time it happened I was just scoping up on a fox.