How to measure current with voltmeter only or multimeter without current measurement

Make a simple shunt and measure voltage drop on the shunt resistor.

to the circuit <---- < Shunt 2,4R or any low value resistor > ----> to the circuit 
*for better accuracy check the value of shunt if you can.

Calculate via Ohm's law:

I, A = Udrop, V / 2,4 R

Bingo!