Battery light on. How to identify alternator model/brand?

[jac]

The plastic housing on the back side of the alternator does not have any markings besides the B+ and B-. I am also unable to see how to remove that housing to even attempt access to the regulator, so I am just gonna remove the whole thing.

Now, to remove the alternator, I guess I need to remove the fan shroud and radiator fan too? Otherwise I don't see how I can get clearance to move the tensioner pulley to losen the belt. I see I need a T50 male socket to move it and the socket alone is like 1.5 inches long so I can't fit the breaker bar nor ratchet without removing the fan. :-(