Not on an 84, that is the mid 86 and later wiring. In 84 models both
smallish red wires go from the alternator to the threaded stud in the
engine compartment wiring box where a total of  4 wires join.The 3rd
wire goes from there to the box containing the fuel injection relays to
power the fuel pump and ECU, etc. The larger 4th wire goes to the
starter motor where it shares the stud with the BIG wire from the battery.

The mid86 and later wiring goes directly from the alternator to the
starter with a larger wire and has a smaller second wire from the
alternator to the wiring box and on to the FI relay box. Bentley 97.70
shows an early type and Bentley 97.87 shows the later, both diagrams are
for 86 models, early and late. Bentley 97.122 shows the later but with
an even thicker wire from the alternator to the starter beginning with
88 models.

The earlier wiring is more susceptible to damage from overheating, as
well as being a longer run for the charging current with more
connections to get loose or corroded.

Mark

Tim Demarest wrote:

> Hey Wes,
>
>         Sorry you're still having troubles. Those two wires on the
> back of
> the alternator are:
>                 1. From starter to the alternator (the big fat wire
> connects from there to the battery).
>                 2. To engine compartment electronics.
> ......................
>