Look anywhere there's a chafe point, especially where the harness runs over a square or sharp edge. Sounds like the tank is pressing the harness against something and has worn through the insulation.
10 Ducati 1098 Streetfighter S - "Sleipnir"
09 Kaw Versys
67 Triumph Bonneville TT Special
"The problem with Socialism is that you eventually run out of other people's money" _____ Margaret Thatcher