i have done that,the test result is.... the fuse is ok....the voltage on both sides are 12v +
i ground the blue and the motor was running ok....i test the 3 pin connector,the red is 12v +,the yellow is strange variable voltage,it is between 1.1v at low and 13v+ at high fan,is that ok as the voltage from yellow is 2v to 8v.
is it the regulator or the ccu.many thnx