the other day i was testing my charging system with multimeter,it showed things were not optimal, i got everything running nice.. new wires etc....magar my car still goes as fast as it used to, it is still a margalla....so test light ftw....according to test light it was no problem and really its just that it starts faster and lights are brighter...test light was right...no problem

okay no more sarcasam
test light is not as precise as a multimeter
but it is good for some jobs when you just need speed
or when you are dealing with pulses, e.g ignition coil...most low cost multimeter can not handle pulses