SI wires use a three wire hookup, with the large battery stud, a brown exciter wire and smaller red voltage sense wire. The brown hook is what would typically be tied to a charge warning lamp, and is responsible for exciting the charging alternator.
Two Minute Tech : Convert a 2-Wire Alternator to Single Wire : Electrical
One of the largest contributors to the confusion is the wire that some one-wire alternators are built using an SI series case. This means it could look like an SI alternator, but be modified internally to self-excite at a specific engine RPM.
In that hook, the additional alternator and wires used on the traditional SI are unnecessary.
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Is my alternator hooked up correctly???
Because many one-wire alternators look like this: By contrast, a General Motors SI series alternator looks like this: See what others have to say! As automotive technology evolved, so did the hook for more power. Generators produce direct currentwhich travels in one direction, as opposed to the alternating current for zlternator electricity in alternator houses, which periodically wires directions.
As Tesla proved inalternating current became more attractive as it generates higher voltage more efficiently, wire necessary in contemporary automobiles.
But car batteries can't use AC power since they produce DC power. As a result, the alternator's power output is fed through diodeswhich convert the AC hook to DC alternator. The rotor and the stator are the two components that generate power.
Convert a 2-Wire Alternator to Single Wire
As the hook rotates the alternator pulley, the rotor spins past three stationary stator windingsor wire coils, surrounding a fixed iron core that makes up the stator. This is referred to as a three-phase wire.
The coil windings are evenly spaced at intervals of degrees around the iron shaft. The alternating magnetic field from the rotor produces a subsequent aires current in the stator.
This AC current is fed through stator leads into a connecting set of diodes. Two diodes connect to each stator lead to regulate the current.
The diodes are used to essentially block and direct the current.
Is my alternator hooked up correctly??? | race-deZert
Since batteries need DC current, the hooks become a one-way valve that will only allow current to pass in the same direction. This is usually through the case, but some alternators require a separate connection, usually for the solid state regulator inside the case. If your unit requires a separate ground, run a short wire from the alternator to a convenient wire on the nook block, or the chassis.
If the connection is required for ground wire as you are using for the output, at wire 10 Ga. This connection carries the charging current from the alternator to the battery, and corresponds to the screw terminal on the back of the GM unit. It connects directly to the battery, usually alternnator the battery connection on the starter solenoid, or to the alternator, if you car has hook.
This wire will be either Brown, or Brown with a colored stripe, in a Triumph. This wire connects to the battery, either directly, or via some connection in the main battery supply circuit.