What is B+ and D+ on alternator?
B+ is the battery + connection ( ie the main output terminal) W is the connection for a tachometer. D+ is the warning light connection ( without which it will probably not function) D- is the battery negative connection.
What is the blue wire on an alternator?
An alternator needs a 12v supplied circuit to ‘excite’ the windings so it can start to charge. This blue wire comes from the one side or the alternator light and the other side of the light comes from switched 12v+ supply. So in other words – this wire supplies that exciter circuit.
What is D on an alternator?
D: (Externally Regulated) This type of connection is used on alternators without an internal regulator. The regulator is normally a separate unit or can be built into the vehicle ECU. F/I: (Field) The US and Korean Delco alternator has two codes for the same type of connection (F/I).
What are the main wirings of alternator?
Since an alternator is connected to so many components, it exhibits a complex wiring system. The main wirings include the exciter wire, positive and negative cables. Exciter wire is connected to the L terminal of an alternator and is used to turn on the voltage regulator.
How does the PCM control the alternator?
Many late-model vehicles use the engine computer, which is often referred to as the powertrain control module (PCM), to control alternator output. Most modules use an internal driver to turn the alternator’s field circuit on and off.
Where are the electrical regulators on an alternator?
Electronic regulators can be mounted internally (inside the alternator) or externally (somewhere else). Exactly what wires go to an alternator will depend on the system design. But generally, an alternator (that’s not computer controlled) with an internal regulator will have three terminals. The terminals are as follows:
Where is the exciter wire on an alternator?
Exciter wire is connected to the L terminal of an alternator and is used to turn on the voltage regulator. Excitor wire is needed to generate the voltage required for the alternator to start running. Source: blogspot.com