Postive / Negative ground system

[steve wicker]

That all sound right except that my 3rd wire is about a 4 gauge and on one
bus it goes from + on alternator to + on starter solenoid and on the other bus
it goes from - on alternator to a ground on the back of the starter body, which
shares a terminal with a ground strap. Thanks for the info. I'm learning!
Also, one bus is wired with an exciter wire and the other had the
alternator rebuilt so that it doesn't need the exciter wire anymore, but the
exciter wire is really small compared to the 3rd mystery wire.

Steve

Tom Warner wrote:
You have a negative ground system. As far as I know Bluebird never
made a postive ground electrical system.

You should have a red wire attached to the Plus terminal of your
alternator and going to either the positive terminal of your battery
or the positive terminal insulated fromo the chassis and then to the
Plus terminal of the battery.

The black wire is attached to the minus(negative( terminal of the
alternator and then to ground. Sometimes it goes to a stud on the
starter and then a ground braid to the chassis.

The third wire is probably a sense wire and goes from the internal
voltage regulator stud on the outside of the alternator and then to
the positive battery terminal. It senses the true voltage from the
battery and NOT the voltage across the positive and negative
terminals of the alternator.

tom
1982 FC35
Vernon Center,NY



Steve Wicker
http://www.360partybus.com
828-236-2841/301-0245


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