Battery going flat overnight. Difficult to start.

Vehicle is a bit rough, looks like someone already has been tinkering with this vehicle. Don't really like parasitic draw problems, some of them can be a massive commitment in time. As a rule, confirm that the vehicle has a parasitic drain by connecting an Ampmeter in series with a fully charged battery, disable the bonnet switch and lock the car. Since I don't know how long it takes for this vehicle to go to sleep, I just leave it for 1.5hrs and check then. Confirmed steady 0.55 A draw or 550mA. {{pic1}}