If you have 12 volts at the large connector and 12v when you turn the key at the small solenoid terminal then suspect faulty starter,I take it all earths and battery/conections are ok? Not unusual to have faulty new parts.
cdc
May 2015
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix cars.