Something is not right. Whether its the ammeter, or the multimeter (Digital or analog) I don't know.
Check the multimeter ohms setting against a known resistor.
You could use the ballast resistors. If your car has just one, its probably around 0.6 to 0.7 Ohms. See if the multimeter ohms setting gets anything close to that.
If the car has a dual ballast resistor, one is 0.5 ohms and the other is 5.0 ohms
