On my MK4 XR3i (EFI) I am having trouble with my battery charging.

It is a new battery and I replaced my alternator which I pressumed was broke. I fitted a refurbed alternator but the battery was still not charging up. I took the refurb back and got a brand new alternator.

I put this on and still not working.

Whilst the car is running is is drawing 9amps, yet nothing is going back to charge the battery.

I have also checked the starter motor which is fine and the cables from the + on the battery aren't drawing anything major whilst engine is off.

Anyone got any ideas what the problem could be?

Cheers