Stator issue. Big Boss 6×6 250 94mod

Hi i have a charging problem. No charging on batteri it seems 10v.i have measure on the stator wires but i dont know whats correct.
The is a plugg with 3 wires , 2 mail and 1 female. 1 brown earth. 1 yellow and 1 yellow with red stripe. Between the yellows i have 1 ohm. And with engine running ist from 12 to about 25v ac. Shall i do other measurement? Help:)