Hello, my friend drives a Mazda Demio. at about 4000 rpm the charging control lamp goes on (under 4000 rpm) it goes off again. have now measured with a measuring plier the amperage number, which brings the alternator, that is in the stand gas about 2.4 A and at full throttle 24 A. is that normal or not? is a 70A alternator. can someone give me an info? Thank you