Found it, one earth goes to the body, and one earth goes straight to the gearbox from the battery. It seems fine, just alittle burnt and corroded. I started the car up, after about minute and half it flickered the lights again, you can feel its not running correctly after the lights comeon. the rpm drops and everything slows down. which shows the battery is not being charged. But why is this intermittent? It should allways be on or off. But it randomly comes on or goes off. Also, why does the fuel filter light comeone at the same time as the battery light comes on? Just don't understand what the hell is going on?