I read that you have voltage, but no current. That is correct. In order for you to have current anywhere, your blower motor would have to be working or a direct short somewhere. Always check for voltage first, then when you get your regulator replaced then you can check for correct current. Your regulator is open and so you will have no current. You have to have a complete circuit to have any current. To test reg you just jumper a good ground to the output side of the reg. If it then works replace reg, if not then replace blower. It is a good idea to get an amp draw once the motor is up and running.
Hope this helps JohnT