Just re-read your question posed about where you check the current amps.
" As a point of interest where do you check the current amps. From which point to ground? "
When you check voltage you use say a voltmeter from earth to a point where voltage might be expected , say a better. When you check current /amps you need to have you multimeter switch to the amps setting and it is connected in series. Maybe you had errant finger on the keyboard.