Nothing will work unless all three battery cables (two positive one negative) are connected firmly to the battery. Jumpstarting wont work because there is no connection of power to your ecu. The ecu runs everything. The second cable on the positive side is behind the big cable going to your positive side. Sometimes this cable that provides power to your car's "brain" comes loose. If it comes loose there will be no power inside the car since none of the electrical relays will be allowed to switch on. No lights on the dash, no lights inside the car with the door open. Nothing at all.
Saturday, August 11th, 2012 AT 5:21 AM