FR would be, and I quote "Field signal to car-computer".
This signal consists of one (field) phase for timing reference...
By the way, L is your control-lamp on the dashboard, S is a reference current (Sense) and IG is indeed ignition...
The IG terminal on a Denso alternator is the ignition input. The S terminal is used by the regulator to monitor battery voltage and the L is the regulator used for grounding the warning lamp.
Terminal forks
If this connection is used, it is generally connected to the light in the dash that shows alternator fault (NOT the voltage gauge!) and then through the ignition switch to the positive battery terminal.
On most ND three pin plug style alternators the pins are marked as "L" / "S" / "IG" The only other connection is usually a large single post terminal marked "B" This is the main wire connected to your battery and is hot at all times. The three others are fairly easy to understand. "IG" This is the Ignition wire and issues the "wake up" to energise the circuit when ignition is switched on "L" This terminal is connected through to the charge warning light on your instrument cluster "S" This terminal is connected to your battery source and is hot at all times, it may even be connected to the main wire on the large B terminal in the loom but more often to the battery through a fusible link hope this helps
None of The terminals would work
The positive terminal of the battery would be connected to the positive terminal of the ammeter. The load would then be connected between the two negative terminals, positive side of the load being connected to the negative side of the ammeter.
Terminal 5, the international terminal. Terminals 1, 2, & 3 are connected. BTW, there is NO Terminal 4.
The black terminal is typically connected to the negative terminal on the circuit, while one of the red terminals is connected to the positive terminal. The other red terminal is used to measure the voltage across the circuit by placing it in parallel with the component or point where you want to measure the voltage.
If the motor terminal has six terminals in the terminal box, then it can be connected either in delta or star. If there are only 3 terminal wires then the motor can not be connected in star.(it means that the motor is designed to be connected in delta only)
To wire the alternator on a Ford 302, first connect the positive terminal of the alternator to the battery's positive terminal using a thick gauge wire. Next, connect the alternator's field terminal (often labeled "F" or "I") to the ignition switch or a voltage regulator, depending on your system. Finally, ensure that the alternator's ground is securely connected to the engine block or chassis. Always consult the specific wiring diagram for your model year for precise connections.
To wire the alternator to the solenoid on a Ford Granada, connect the alternator's output terminal (usually marked as "B" or "BAT") to the positive terminal of the solenoid using a suitable gauge wire. Ensure that the solenoid is connected to the battery's positive terminal. Additionally, connect the alternator's field terminal to the ignition switch or voltage regulator as required for proper functioning. Always consult the vehicle's wiring diagram for specific details and ensure connections are secure and insulated.
Positive terminals typically have a red color or a "+" sign indicated, while negative terminals are usually black or have a "-" sign marked. Additionally, positive terminals are connected to the cathode, while negative terminals are connected to the anode in a battery or electrical device.