[Photoman]

NLXTACY

To try to clarify the main wiring, a new 4 gauge or larger wire is run from the alternator “B” post through a fuse to the battery positive as many have done. The stock connector lug at the alternator “B” post has a large white wire in it which is being replaced, plus a smaller white wire that goes to the under hood fuse box and the in dash fuse box. The small white wire needs to be connected to the “B” terminal, either by cutting it and putting it in the same lug as the new 4 gauge wire (as Ivan80 did), or by leaving the stock “B” connector bolted on with the new 4 gauge wire (parallel as John did). If paralleling the big white wire is bothersome, it can just be disconnected from its fuse link in the little AM1 box by the battery.

Upgrading the battery ground or negative is a good idea to balance and maximize the new alternator output.

Fwiw, I took the wiring harness apart about 12 inches from the alternator “B” post. In the picture it can be seen that Toyota splits the small white wire here in to 3 wires. Two wires go to the under hood fuse box, and the other goes to the in dash fuse box. See picture.



Brian894X4 – I think you are back feeding the small white wire through the fusible link and big white wire? If I mislead you in some way I apologize. Congratulations on getting it all together and running.


Bill


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