Subaru Impreza WR1 Alternator Test. No faults found yet. Might be the ECU needs resetting. 

The alternator tests ok. There is a COMM connection that gets a signal from the ECU to tell it when to charge. So it stops charging when you want to go fast and charges when you put the brakes on. I`m no expert. Any advice would be nice to help us all out. If someone knows the signals that come into the alternator from the ECU that would help me make an Arduino test device for us to use.