, Dieter Thiessen wrote:
>
> In the process of tuning my 84 GL this morning the lite blue wire that is
> outside the larger wire bundle attached to the alternator got pushed against
> the alt.

Hi Dieter,

The wire is the D+/61 circuit and it is for Alt lite control. When the
Alternator is not rotating(or charging) this circuit provides a ground
for the Alt lite. When the Alternator is charging, this circuit is
filled with voltage which electrically removes the ground and turns off
the Alt lite.

Regards,    John