(refer to myfordtractor for the discussion) I know a lot of people just jumper it to the hot post but if this way works better I'm all for it. I'm not even real sure what #1 and #2 really do but I'll trust those that do. stops it is grounded and the light should come on letting you know there is trouble. When the engine is running the the light should go off because it is getting fed 12v from both sides. The bulb should come on when the key is turned (engine off). The purpose of the parallel resistor is to backup the light in case the bulb burns out. you just threw the belt.no voltage supply and no water pump). It also serves to provide a visual if the alternator quits working (i.e. Not sure of the specifices but it is supposed to work better that way. Supposedly it is better to run it through a lamp and/or reisistor. #1 serves to energize the alternator so it can make voltage. I don't know about that, just what I read. #2 is supposed to "tell" the alternator how much voltage to make. I don't know if it matters or not where it is tied in. The #2 from the alternator is wired into the lighting leg from the key switch. Seems to make more sense knowing the voltage. This is what I have come up with by using the JD Service Manual, myfordtractor, Ehow, various other sites and forums, and a little bit of head-scratching. Therefore, it is important to consult the wiring diagram for your specific vehicle to ensure proper identification of the wires and their functions.Please review and feel free to make corrections. Note: It is important to note that the colors of the wires in the 4 pin connector can vary depending on the make, model, and year of the vehicle. The white/green wire is the ECU output signal (D10), this wire sends a signal from the Engine Control Module (ECM) to the alternator indicating the required alternator output.The white/red wire is the FR signal to ECM (D9), this wire sends a signal to the Engine Control Module (ECM) indicating the alternator’s current output.The white/blue wire is connected to the ICU/Instrument Cluster (Battery Light), which is responsible for illuminating the battery light on the dashboard when the alternator is not functioning properly.The black/yellow wire is the 12v (+) power source, which provides power to the alternator and the battery.Each wire in the 4 pin connector serves a specific function. The 4 pin connector in a Honda 4 pin alternator wiring diagram is responsible for connecting the alternator to the rest of the electrical system in the vehicle. Honda 4 Pin Connector Wiring and The Diagram The colors of the wires in the 4 pin connector can vary depending on the make, model, and year of the vehicle. It typically consists of four wires, each with a specific function. The 4 pin connector, also known as the alternator connector, is the main connection point between the alternator and the rest of the electrical system in the vehicle. The wire connected to the B terminal is typically white. It is connected to the ground source and is responsible for providing power to the battery. The B terminal, also known as the battery terminal, is located on the back of the alternator. In a Honda 4 pin alternator wiring diagram, there are two main connectors to be aware of: the B terminal on the alternator and the 4 pin connector. The wiring diagram for the 4 pin alternator connector provides information on the functions and connections of each wire, making it easier to diagnose and repair any issues with the alternator system.īy familiarizing yourself with the wiring diagram for your specific make, model, and year of Honda vehicle, you can ensure that your alternator is functioning correctly and keep your vehicle running smoothly. The alternator system in a Honda vehicle consists of several components, including the alternator itself, the voltage regulator, the battery, and various wiring and connectors.
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