Hi Loren:
        I'm not sure just how accurate most ammeters were/are but you
will recall from your younger days that when you set the ign. switch
to "ON" the meter always deflected to the right 1/2  'unit of
measure.  That's on a 60 amp. ammeter, where there were 3 lines (or 4
spaces) before you got to '60'.
        If each line was accurate and I don't think for a minute that
they were; then it would have been 1/2 of 15 or about 7.5 amps.
        That sounds quite high but perhaps starting the fuel pump,
charging the alternator and the various dash warning lights as well
as the various solenoids; it very well may be reasonable.
        Short of using an actual digital meter, that's my best guess.
Why do you ask?

                                David (TDdsl82westy)
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>What should I expect to see in current draw on the main (starter) battery
>with nothing running BUT the ignition switch turned to on?  That's engine
>not running.