Alternator exciter wire diagram

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Alternator Exciter Wiring Diagram

Simplified Alternator wiring. Previous template Next. Posts Latest Activity. Page of 1. Filtered by:. March 7,PM. Found this on the internet. I've done a fair amount of playing with VW Bosch alternators, both internally regulated and externally, and everything he says makes sense to me.

Anyone disagree or have any input on this conversion as described? I'm sure there are some electrical engineers cringing out there but I and most of the chevy guys I know have used these methods for years I prefer the three wire setup just for the dummy light on a side note my 10 year old POS reman 3-wire charges better at an idle than my amp 1-wire powermaster.

Of all the paths you take in life - make sure a few of them are dirt. Tags: None. If you run straight 12v, it'll overcharge the battery. Doing it all wrong since Comment Post Cancel. Like this? It's how it's currently set up in my Firebird and I can definitely say I don't have an overcharging problem.A popular form of performance upgrade revolves around applying current technology to older machines.

Among the most overlooked aspects of swapping late-model engines into early Chevys is upgrading the charging system. Since then, a landslide of charging system and alternator enhancements have followed. We decided we needed to focus our attention on some of the more popular alternator conversions and wiring harness modifications necessary to accommodate them. We wanted to get input from a few professionals in the world of automotive charging, so we reached out to Tuff Stuff Performance and Painless Performance.

On the back of GM alternators, you will find a two- or four-wire plug along with a large output stud. The large stud is for the output wire connection that is connected to the battery positive post.

Even a stock replacement CSD will offer more power at low speeds than previous models. Other alternatives that also work well. In nearly all cases, alternators are rated by maximum potential-amperage output. This is not amperage delivered while at idle! The original DN externally regulated alternator is probably not capable of much more than 35 amps at idle. Back in the days of AM radios, that was enough to maintain system voltage. We spoke with Mike Stasko, marketing manager for Tuff Stuff Performance, and he has a recommendation.

Late-model alternators are far more efficient at idle, so a stock amp alternator might be capable of 60 to 65 amps at idle. Alternator rating numbers are generally tested with the alternator at ambient temperature.

Unfortunately, with the charging system at normal operating temperature, internal resistance increases with heat, and the output drops, typically by 15 to 20 percent. If you have an alternator rated at amp at idle, its normal operating temperature is probably capable of only around 75 to 80 amps.

The net result is a loss of system voltage at idle. These are the four most common alternator connectors. If you are not sure which alternator you have, the connector shape is a good indicator of alternator configuration. To evaluate your charging system, try this simple experiment.

How to Wire a 1 Wire Alternator (10SI Delco Style) to a Farm Tractor

With the engine idling at operating temperature, turn on all the electrical components such as the headlights, blower motor at full speed, four-way flashers, electric fans, and the stereo at a reasonable level. Then, note the electrical system operating voltage. They need a minimum of All About The Connections. This alternator DNuses a flat, two-prong connection at the back of the alternator. The other main connection on the alternator is the output terminal that charges the battery.

The main advantage of either unit is they employ an internal voltage regulator SI stands for system integrated. But this is not a simple bolt-on conversion. The and SI units use a different two-wire connector plug on the rear of the alternator. The Number 1 wire on the or SI is connected to the charge warning light on the dash.

The Number 2 wire is what is called the voltage sensing wire.When guys are updating their electrical systems in their cars, they have lots of choices.

One of those choices is between a 1-wire and 3-wire alternator. As its name implies, the 3-wire alternator has three electrical connections to it. The first is the large lug that connects to the battery. This is the main current feed that charges the battery and powers the car when the engine is running.

There are two smaller terminals, usually spade terminals on the top of the alternator. One of these is the sense terminal. You connect the output of the alternator back to this terminal so that it can sense and regulate the output voltage.

The other terminal is the exciter. This is what excites the field of the alternator. The following diagram shows the wiring for a typical 3-wire alternator connected to our Infinitybox system. Please refer to the manual and wiring diagram that came with your alternator for more specific details.

Wiring diagram showing how to wire a 3-wire alternator with the Infinitybox system. First, you need to connect the alternator directly to the positive terminal on the battery.

alternator exciter wire diagram

This is how the battery gets charged when the engine is running. It is very important to make sure that nothing interrupts this feed to the battery. You should never install a disconnect switch between the alternator and the battery.

alternator exciter wire diagram

Read this blog post for more information. Next, you must wire the sense terminal. Check the manual that came with your alternator. Usually, this is a direct connection from the alternator output back to the sense terminal. Lastly, you need to wire the exciter. This is where the charge light gets connected into the system. The other end of the light connects to the exciter terminal on the alternator. This diode blocks current from feeding back into the ignition system.An alternator is an auto part that transmits power from the fuel system to the battery for operating vehicle accessories, such as the radio, headlights and air conditioning fans.

A wire called an exciter generates the voltage needed for an alternator to start working once a vehicle is started.

alternator exciter wire diagram

Generally, three wires are connected to an alternator, including the exciter wire. The exciter, which is a low-voltage generator that transmits DC power, sends electric current directly to the alternator. If the exciter wire is disconnected or not working properly, it will not transmit voltage to the alternator, and as a result, the alternator will not generate enough power to operate accessories. This article was written by the It Still Works team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information.

To submit your questions or ideas, or to simply learn more about It Still Works, contact us. What Is an Alternator Exciter? About the Author This article was written by the It Still Works team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information.

Photo Credits engine image by Tomasz Pawlowski from Fotolia.Self-Exciting Alternator makes no need for Alternator Wiring Diagram The Self-Exciting alternator is an alternator that has a special voltage regulator that doesn't need an ignition wire to activate it. This is usually based on a chevy alternator type and only requires a battery wire connected to the battery terminal.

Hitachi/Mitsubishi Alternator Kits

The voltageregulator 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. The regulator does this by sensing the RPM the alternator is turning, when it gets to a certain rpm the voltage regulator "turns on".

Typically you start the vehicle, rev the motor slightly with the si series and alternator starts charging. With the CS series delco alternator with the self exciting voltage regulator you do not need to rev the engine.

The CS series alternator with self exciting voltage regulator willgive you faster alternator voltage. In choosing this type alternator you must consider, do you want to rev your motor slightly to get the alternator to turn on, if not the choose the CS series type alternator.

Also when using the self-exciting alternator on tractors or other slow turning motors does the engine have enough RPM's to start the alternator charging. This can be overcome by using a smallerpulley or by adding an ignition wire or momentary push button. When finished and you've bookmarked this site please visit www. What is the difference between a one wire alternator, two wire alternator and three wire alternator?

You only need to connect the battery wire one-wire. The alternator turns on the voltage regulator when the engine starts turning the alternator. Two-wire Alternator: Most standard and all self-exciting regulator alternators will work using the two wire setup.

Two wire means that you use the main battery wire to the back of the alternator and also ignition wire to the 1 terminal to activate the alternator. With this setup the alternator starts charging as soon as the engine is running. Voltage sensing is used when you want the alternator to read voltage at some other point than the battery. Or the battery wiring is such that the battery is a long distance from the alternator.

All rights reserved. Trade marks and trade names used for reference purpose only. Alternators By. Search Pages: Find. Search Pages: Search. Toggle navigation Main Menu. What is a self exciting one-wire alternator?

What is a self exciting (one-wire)alternator? How to solve Alternator Wiring Problems

How to solve Alternator Wiring Problems Self-Exciting Alternator makes no need for Alternator Wiring Diagram The Self-Exciting alternator is an alternator that has a special voltage regulator that doesn't need an ignition wire to activate it.

Site Map Privacy Policy.Forums New posts. What's new New posts. Log in Register. What's new. New posts. Log in. For a better experience, please enable JavaScript in your browser before proceeding. Thread starter xriss Start date Jun 12, I do this to every vehicle I find this problem on.

The manufacturers try to save money and believe it is ok. It is not ok and straight to the battery is better. I also enlarge the wire size. It can only help, just make sure it is fused properly. Remove the wire from the starter to the alternator and just leave the one from the starter to the battery.


You will never hurt anything and will have a more reliable charging system. Last edited: Jun 12, Eric Experience Well-known member. Never put a fuse in output of an alternator. If that fuse was to blow or come loose you will destroy your alternator, this happens because the regulator in modern vehicles senses the voltage at the ECU, so if the voltage drops due to a faulty fuse the alternator is cranked up to max output.

The best cure for the faulty crimps is to wash the crimp in liquid flux and then solder the crimp. Keep the cct standard. Bosch are the worlds best engineers. Oldfartt Member. Cheers Ross. Ross said:. Graphite Dave Dave Orton. If you replace the Mercedes "Y" wiring with two separate cables, should the cable to the battery be fused and should the cable to the starter be fused? Two fuses?Alternator Exciter Wiring Diagram — alternator exciter circuit diagram, alternator exciter wiring diagram, Every electrical arrangement is made up of various different pieces.

Each part ought to be placed and linked to other parts in particular way. If not, the structure will not function as it ought to be. In order to make sure the electrical circuit is constructed properly, Alternator Exciter Wiring Diagram is demanded.

How does this diagram aid with circuit building? The diagram offers visual representation of an electrical arrangement. However, the diagram is a simplified variant of this structure. It makes the process of assembling circuit simpler. There are two things which are going to be present in any Alternator Exciter Wiring Diagram. The first component is symbol that indicate electrical element from the circuit. A circuit is usually composed by many components. The other thing which you will get a circuit diagram would be traces.

Lines in the diagram show how each component connects to one another. The positions of circuit parts are relative, not accurate. The order is also not logical, unlike wiring schematics. Diagram only shows where to put component in a spot relative to other components inside the circuit. Despite the fact that it is exemplary, diagram is a great basis for everyone to construct their own circuit. One thing you have to learn before studying a circuit diagram would be your symbols.

alternator exciter wire diagram

Every symbol that is presented on the diagram shows specific circuit component. The most common components are capacitor, resistor, and battery. Additionally, there are other components such as floor, switch, motor, and inductor.

According to earlier, the lines at a Alternator Exciter Wiring Diagram signifies wires. Sometimes, the wires will cross.


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