You didn’t really give any information to go off of.
Are you using my kit? If not exactly what are you using?
Are you sure it is a hardware problem not a software problem.
What is your plunge speed, How did you make your gcode?
If you want to check the stepper driver (is it a drv8825?) turn the meter to the lowest DC setting it has. Then negative of the mutlimeter to the negative on the green plug. Positive goes to the little silver round potentiometer on the driver.