New to the forum. I have a open station 7060 loader tractor which is 2 years old. Lately when the temperature drops below freezing the tractor will not start. I use a block heater.glow plugs etc. It doesn't turn over. Later in the day when the temperature rises it will start fine. I have cleaned battery terminals, starter connection, ground connection. I checked the fuses they appear fine. I am starting to suspect safety switches. I would like to check out the one on the shuttle shift the but the diesel tank is in the way. Before I move the tank does anyone have any ideas what the problem could be?