So I have been running the Maxima alternator in my roo for about a year now, pretty happy with the results. My one concern is that I am still using the factory power wire from the alternator to the junction box/fusible link holder thingie. I am adding a winch, inverter and various other gizmos which will result in more draw on the charging system, and that little wire seems to be a weak link in my mind. Can I run a power wire directly from the alternator to the battery with a inline fuse and leave the wire that goes to the junction box alone? Can i run a bigger wire directly to the box and get a higher amperage fusible link? Am I worried about nothing? Any input would be greatly appreciated! Thanks

When I burned the fuseable in my first datsun truck I just put an in line fuse in. Just judge your amperage accordingly and keep it safe I would assume.

http://www.ultimatesubaru.org/forum/topic/117929-h6-100amp-alternator-on-ej22-swap/
Looks like this guy (obviously different application but same idea) did a big wire to the battery and left his stock power wire as well. But is that necissary?

The safe thing to do is run a new wire of adiquate gauge, with a fuse, to the + battery terminal.

Do I keep the wire that goes to the fusible link?

The original wire and fusible link are too small. They should not be used. Add a new thicker wire, and proper size fuse.

I know what everybody says is the right way to do it and I'm not saying I disagree, but; I slapped in a maxima alt four years ago and did nothing else. Running fogs and 1000 watt amp, I've yet to burn out a fusible link or anything else for that matter...

Everything works fine.... Unless something goes wrong, and the existing wire gets shorted. I almost burned down my first car due to improper fuse placement.

But is it nessicary to maintain a direct power wire to the fusible link box in addition to have a fused wire directly to the battery?

Ah,  here is what to do - disconnect the OEM thick white wire from the alternator output post.  Tape off / insulate the lug, really well.  Make a new output wire and fuse, and connect from the new alternator's output post to the + battery post.  The circuits normally powered by the white wire and it's link will still get power without further modification, via the link which is still in place.

Ok thank you!