Remember to check your fusible links

Land Cruiser Fusible LInk

Remember to check your fusible links

What I thought was a failing alternator or regulator turned out to be a simple wire off the starting battery called a fusible link. Unfortunately we figured this out after replacing the alternator which is about a 2 hour job on the BioCruiser.
On the upside the old alternator was an 80 amp and the new one is now a 100 amp. :)