400A is a bit high, but is that the peak? What is it, more or less steady-state, _while_ cranking? Is the update rate of the meter such that it's readable then?
I like the Fluke, in part because it's very quick to update, unlike my $3 HF in-car meters. It also has an analog scale that updates much faster than the digits do. Handy for readings that move. Next best thing to an analog meter for watching the wigglies. Diesels draw more than gassers, both because there is something like a 50-80A load from the glow plugs, and because the 2x compression ratio takes more ponies to turn over. Initial current on GP's is even higher. Probably the same for the starter. When in doubt, compare it to something similar that is not having starting problems. I have a record that a 240D draws 300+A when starting. A major diagnostic is to be able to measure the voltage drop, while cranking, between battery + and the starter terminal, and battery - and the starter body. Should be very little measured voltage, and it should be pretty symmetrical + vs -. -- Jim _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
