With ignition off, usually theres less than 400ma. Unless you have a clamp meter to measure current (Clamp meters just go around the cable rather than "breaking" into the circuit ie removing cables and can measure higher current etc) normal meters only go to about 10 amps. Charging rates are sometimes higher than that and may damage the meter. If you know someone with a clamp type multimeter, might be better if you let an autoelec try and solve it. When a car is starting, expect around 240 amps, more if your starter is worn! Member Mayhem on here could give some pointers...? Without having the car in front of you, its hard to diagnose.