Hi Jonathan. Car is 12 years old with <3000 miles when I picked it up so not much use in that time. No battery cut off switch, going to get one fitted soon. Has a new Banner battery, charging I would say is normal(why wouldn't it be, not sure of the relevance, it starts and goes ok). No voltage problems indicating on the dash. What is the reasoning behind disconnecting the fan, it does not cut in until about 100 degrees anyway and car is not that hot when I go to switch it off? Nick