How To Test Amperage Draw. For example if an element in your vehicle is draining your battery you can conduct an amperage test in such a case. On some meters both are fused.
The port marked with A measures amperage. The positive terminal is labeled and the negative - The wires connected to the AC motor are colored red for positive and black for negative. Photos text illustrate using the Digisnap DSA-500 snap-around digitial multimeter from AW.
Starter Cur Draw Test Motor.
Check the multimeter or ammeter to see what the reading is. Check the multimeter or ammeter to see what the reading is. The port marked with A measures amperage. It is always best to do a parasitic draw test from the negative side so there is no chance of accidentally shorting should you test from the positive side.
