Australian Car Repair Issues? Ask an Auto Mechanic for Answers ASAP
providing you can identify what wire is waht on the 3 pin then yes its possible as the old 2 pin will have had the 'sense' wire that runs back to the charge light and an 12V feed with the earth off the alternator body
whereas the new will possibly have the earth running back to the instrument pack so that may need bridging over to earth
If you're not sure on any of this any auto electrician can quickly identify what wire is what for you
do you still need help?
Bear in mind that the site takes a deposit from you at the beginning and this is held by the site until you rate my answer at which point the cash is split between the site and the expert. so if my answers have been helpful please rate my answer.