Stock alternator to 12 SI alternator

[Andy4639]

I hope this will make things a little clearer on this swap.

The trucks stock alternator and external regulator have always been a weak spot for these trucks if you add many electrical accessories to them, The stock alternator was a 37amp which was plenty for a plain truck. But who leaves their truck to plain??

Anyway I hope this clear's up some of the confusion and questions on this swap.

Take the stock alternator off the truck and replace which ever you decide to use. I like the 1985 Buick Riviera, 5.0L (307Y engine), with Heavy Duty options and Air Conditioning.”
This mod doesn't require any new wiring. It just re positions what's already there.

Ok for the choices you have for the install.

Picture #1 is what you start with.
Picture #2 is with the jumpers @ the regulator used.
Picture #3 is stripping the harness cover back and running the brown & red wire straight to the alternator. Much cleaner install.
Both ways work fine and as Vette has stated before, the system works as it's suppose to from the factory.

There is another option that works but it doesn't use the system feature of sensing voltage drop and kicking up the voltage. So I'm not going to address it here.
Side note.
This mod works for 50,60 & 70 model GM cars as well.
If you have any question on this mod please feel free to ask but keep the questions to this mod only.