My alternator gave up the ghost, so I decided to go ahead and do the 130 amp upgrade from the 2003+ models. It was a pretty straightforward swap except for the wiring of the four prong plug on the new alternator. Once you figure out where the wires go from the old harness to the new plug it’s pretty easy. My old plug dsintegrated while trying to remove it.
For what it’s worth the Denzo reman alternator was cheapest at rock auto. However, my first when I arrive damage as the plastic plug was already broken, but they have another one in short order so no complaints.
While I was already in there I decided to go ahead and start the big three upgrade. I added a 2/0 gauge cable to run from the alternator to the battery. I was able to follow the factory harness with 6 feet of cable. 2/0 is no slouch when it comes to pushing power!
Are use tin coded solid copper terminal lugs and my Harbor freight hydraulic crimper (one of my favorite tools).
I heat shrink each terminal and use the glue lined shrink wrap for a totally sealed connection. Between the cold weld of the crimper in the glue lined heat shrink I don’t envision this cable ever working it’s way loose!
Toyota made this one easy to connect as there’s a spare Bolt and nut at the terminal block on the alternator fuse at the positive battery post. I had to whittle the terminal down a little bit to get it to fit otherwise it was plug and play. I do love it when a plan comes together.
Im getting a full 14+ volts at the battery now which is rad and better then the 8+ volts I was getting a few weeks ago!