HI!
DO you have a test light ? I would start by checking for voltage at the starter when the key is turned to start, Thanks ROY!
It would be the small signal wire to the starter motor not the big battery cable , see if you have voltage when trying to start, thanks ROY!
If you go through the wheel well with the tire off you will get to it , if the starter motor clicks with the key in the start position, then you should have power make sure it is clicking if not you will have to inspect it , Thanks ROY!
You will have to use a test light on the small wire with the plug on it not the cable, and if you hear a click the new starter motor could be bad not a relay if it clicks the you have power at the starter, Thank You, Let me know if you have any more questions, ROY!
here are your relay locations, Thanks ROY!
once again how do i test those two wires
you have the pic of the wires you will have to check the black and purple wire at the starter motor or at the interlock relay I have sent you all the info you should need to inspect your starter motor let me know if you do not understand, Thanks ROY!
OK!
This is your power flow to the starter motor you need to check for 12volts at these points, Thanks ROY!
ASE Certified Technician
Nissan Master technician