It comes from batt to feed fan, ammeter will show discharge. Sure, bulkhead and ammeter will get the fan loads.

Are we assuming the fan is replacing the stock fan clutch? Or being added to reinforce it?

But if alt quits the right thing is take the car appart and wait for tow, just like if brakes fail or Ign module.

In any case, that’s the exception, not the rule. If we think on every “WHAT IF” posible then don’t try to live.

You can also disconect the fan, and drive back home. Just 50 miles.

Also, if you think on every “what if” well, the same than get small spare parts on trunk, a piece of wire to jump out batt and alt and bypass the amm and bulkhead.

If you are driving at night, lights also will be affected, then the ammeter too.

Alt can fail also with belt broken… which is maybe easier than an alt fail itself.

What about if fan fails?

P.S.:
That’s why I’m fan of the stock fan clutch.