Part of our wiring diagram analysis series of videos shown here on this channel. About the Author Stephen Benham has been writing since 1999. The next time you see the little red light, you will know exactly what it is trying to tell you. As, for example, the north pole of the magnetic field approaches one of the stator windings, there is little coupling taking place, and a weak current is produced, As the rotation continues, the magnetic field moves to the center of the winding, where maximum coupling takes place, and the induced current is at its peak. The second wire of the pair on Pin 2 of the alternator goes to the ignition.
Conversely, if the battery should fail, and the battery voltage drops, with the output voltage of the alternator on one side and the low battery voltage on the other, the lamp will also light. About the Author Stephen Benham has been writing since 1999. The next time you see the little red light, you will know exactly what it is trying to tell you. Denso make aftermarket car parts for many cars, ranging from air-conditioning components, alternators and fuel pumps to smaller items such as spark plugs and wiper blades. I have had the bad luck to have experience the infamous alternator fire that I read so much about in these forums. In other words, with the ignition on but engine off, the indicator light sees 12 volts from the battery via ignition terminal 15 on the coil and glows, but with the engine running, it sees 2 volts 14 volts minus 12 volts running the other way, from the alternator.
This advantage is lost in a Triumph, because of the changes required to the existing wiring to allow the use of a one-wire unit. By this time, the south pole is approaching the winding, producing a weak current in the opposite direction. The voltage regulator which controls alternator output contains circuitry that uses the residual magnetism in the alternators rotor fields to determine when to turn the alternator on and off, a standard Delco alternator would not do this without an ignition activation wire. Voltage sensing is used when you want the alternator to read voltage at some other point than the battery. This serves two purposes - it gives a visual warning that the alternator is not charging, and provides the initial current to get the unit to charge until it can provide it's own charging current.
Prior to perform inspection and maintenance, make sure that: the battery connections are not reversed, because this will damage the rectifier; do not use high voltage testers, such as a megger, because they will damage the rectifier; remember that battery voltage is always present at the alternator B terminal; do not ground the L terminal while the engine is running; and do not start the engine while the coupler is disconnected from the L and R terminals. Onewirealternator, size: 800 x 600 px, source: mightymo. Benham has a diploma in business studies from South Essex College, U. Note if you are doing a 6-12 volt conversion you will need an alternator conversion kit which you can find on the left of this page. After the engine is started, and the alternator is up to speed, the output of the diode trio is fed back to the regulator, and serves as a source of current for the field current. The magnetic field produced has, as any magnet, a north and a south pole.
This test will not prove the functionality of the alternator anyway, as the engine may still run with a weak alternator output. In other words, the current flows in one direction only, and is supplied to the wire coil by a set of brushes and slip rings. The 2 voltage sensing terminal allows the voltage regulator to sense the battery voltage so it knows when to turn the alternator on and off. At this time, with 12 volts on both sides, the lamp is out. If the connection is required for ground wire as you are using for the output, at least 10 Ga.
The strength of the field current determines the strength of the magnetic field. The battery can be damaged if over charged or undercharged, or if left to discharge for long periods. I have purchased the new alternator plugs, but I need a wiring diagram for the ford alternators with two plugs. This wire will be either Brown, or Brown with a colored stripe, in a Triumph. Locate three thin wires near the Denso alternator. A mechanic and truck driver for more than 40 years, Lowell is able to write knowledgeably on many automotive and mechanical subjects.
A rectifier bridge connected to the stator windings contains six diodes, and electrically changes the stator A. Conversely, if the battery should fail, and the battery voltage drops, with the output voltage of the alternator on one side and the low battery voltage on the other, the lamp will also light. If there is any doubt, take this write-up, along with the instructions for your particular car, to an alternator repair shop, and ask the counter man to identify the connections for you. The rotor and the stator are the two components that generate power. Remember each wire can only fit into a certain socket.
The field winding carried on the rotor is energized via a pair of air brushes and slip-rings. This is usually based on a chevy alternator type and only requires a battery wire connected to the battery terminal. Use a solderless butt connector to make the splice. As a result, when the key is turned on, current flows through the warning lamp, through the resisters, transistors, and field coil, and then to ground, causing the lamp to illuminate. Denso's regular aftermarket alternators produce between 40 and 160 amperes, depending on the type, but they also produce vehicle specific alternators that can produce greater amperes.
As a result, when the key is turned on, current flows through the warning lamp, through the resisters, transistors, and field coil, and then to ground, causing the lamp to illuminate. The 2 voltage sensing terminal allows the voltage regulator to sense the battery voltage so it knows when to turn the alternator on and off. As Tesla proved in 1887, alternating current became more attractive as it generates higher voltage more efficiently, something necessary in contemporary automobiles. It connects directly to the battery, usually at the battery connection on the starter solenoid, or to the ammeter, if you car has one. And there you have it — the complete operation of an alternator in a nutshell.