please draw the circuit for the arduino, the MOSFET Drive Module and the motor
show the connections between the arduino the mosfet driver and from the mosfet driver to the motor
show all voltage sources and all ground connections
show all wires between the three pieces
please draw the circuit for the arduino, the relay and the motor
show the connections between the arduino therelay and from the relay to the motor
show all voltage sources and all ground connections
show all wires between the three pieces
clearly label both circuits
the more clear and complete the information, the more clear and complete a response will be
this may help:
https://robu.in/product/irf520-mosfet-driver-module-arduino-arm-raspberry-pi/