What type of light for a 3 wire

[ShawnAgne]

The more I look at the 12V alternator I put in both tractors the more I'm thinking it is a 3wire because it has to other wiring studs like you see on a 3-wire. SOOO, if it is a 3 wire, what type of light or diode should I use and what is the best way of putting them in the circuit?

[Eugene]

http://www.yesterdaystractors.com/artic ... int195.htm

Down at the bottom of the above link, the needed diode or light is listed. On my WD Allis Chalmers, I use a toggle switch to excite the Delco 10SI. The WDs have an extra hole in the dash that I installed the toggle switch.

Thought, take the alternator to your favorite auto parts store, use it for a core, purchase a true single wire alternator. This will save the you the time utilized to convert the alternator to a working one.

Edit: Simple test to see if the alternator is a 3 wire alternator and functioning. Alligator clip with wire attached to the #1 terminal on the alternator. Start engine, 1/2 throttle, touch the bare end of the alligator clipped wire momentarily to the battery terminal on the alternator.

If a functioning 3 wire alternator is should start charging.

[ShawnAgne]

What exactly does the "Warning Light" on a 3 wire "Warn" you about?

[Eugene]

What exactly does the "Warning Light" on a 3 wire "Warn" you about?

Nothing. Perhaps the drawing author could have used a better term, such as lamp bulb and socket.

The "warning light" is to prevent the alternator from back feeding the ignition system when the ignition switch is in the off position.

No "warning light", or diode, or switch to disconnect the #1 terminal feed and you can not shut off tractor because the alternator back feeds the ignition.

[ShawnAgne]

Ah ok makes sense. So basically your just putting something there that takes away enough current to prevent a back feed.

[Landreo]

Did you check the output voltage? The alternator may actually be working.

A 1 wire alternator may still have all of the external connectors. That is not alway a reliable way to tell a 1 wire from a 3 or 4 wire alternator. From your old post this is a Denso alternator. The Denso alternators of this size come in both 3 and 4 wire versions. Wire it for a denso not from a delco 10si diagram. How many terminals do you have, a large battery terminal plus two smaller spade terminals or a large battery terminal and 3 smaller spade terminals?

The warning light is a warning light, it warns you or tells you that the alternator is charging or not charging. Commonly called an idiot light. Assuming you have battery ignition not a magneto, you can use a resistor or diode if you do not want a light.

[Eugene]

The warning light is a warning light, it warns you or tells you that the alternator is charging or not charging. Commonly called an idiot light.

True for GM manufactured autos. How the idiot light works is that if current is flowing through the bulb, one direction or other, at sufficient current, bulb lits up. If everything in the auto works as it was supposed to, when you shut off the engine or engine running, battery voltage and alternator voltage or battery voltage supplied through the alternator are applied to both sides of the bulb - - no light.

The idiot light, resister, diode, switch, for 12 volt alternator tractor conversions performs a specific, different function. Keeps the alternator from back feeding the ignition system.

[ShawnAgne]

Well the link I put up last week was the incorrect one. Here is the pic of the back of it (using the one on the 300 as easier to get to atm). The alternator was "1 wire capable".



I double checked the wiring and it is wired correctly as a 1 wire alternator. It isn't charging because after running the cub a lot the other week plowing snow and using the lights I was down to around 28% charge on the battery.

Not sure if you can read it but says Delco Remy on the back of the body. Also in the name/number there is a -3 making me believe it is a 3 wire.

[clemk]

Usually, especially with Delco, a dash with either 3,6, or 9 is just the clock position of the connector. I've never seen it used to indicate a 3 wire. Of course, it's possible that there's a different numbering system, and my answer is out to lunch

[Eugene]

Usually, especially with Delco, a dash with either 3,6, or 9 is just the clock position of the connector. I've never seen it used to indicate a 3 wire. Of course, it's possible that there's a different numbering system, and my answer is out to lunch

No numbering system. The #1 terminal in the photo is the upper one.

Alternators can be handed. Meaning, remove the 4 screws holding the back to the front, -- rotate the back to any desired position, bolt back together. Works the same. Position of the alternator terminals do not change in relationship to the handing.

PS. Spent summers attending the GE training center in Omaha, Neb. when I was teaching auto mechanics, 50 years ago. The older stuff hasn't changed. Use to be that the vehicle wiring diagram was one page in the back of the owner's manual. Now days you have to purchase a seperate wiring manual for computerized vehicles - - which contain enough if/or/thens to make it impossible to diagnose a problem.

Edit: Since I'm digressing. Had a Dodge Dakota, 6 cylinder. Radiator needed replaced, standard one didn't fit, 2 weeks to get the correct fit. Had an engine running condition. In the Dodge dealership half a dozen times. Big bucks and no help. Reading, researching, more reading, finally found another sensor on the engine block. Of course this one was not listed in any of the manuals. Replaced the sensor, engine tune up, ran fine.

[ShawnAgne]

So Eugene safe to say it's a 3 wire?

[Slim140]

That is not a one wire alternator. I have one like that on a J.D. A. Here's one way you can wire it. I don't have a switch on my J.D. and have to disconnect the battery every time after I use it or the battery will drain, I have a jumper on mine though from the "bat" to one of the plugs (can't remember which one) and have no warning light either.

[Eugene]

The more I look at the 12V alternator I put in both tractors.

As I read the sentence, you installed 2 "single wire" alternators in 2 different tractors.

Does one or both alternators not work?

I would take the alternator or alternators to a shop that can test them. They will be able to tell you if they are working and if they are 1 wire or 3 wire alternators.

Where did you purchase the alternators?

[Gary Dotson]

Generally, when you purchase a one wire 10si Delco style alternator from the major suppliers, it will have a rubber plug hiding the two side terminals. Since your has no plug, I'm guessing it's a three wire, although that's not a sure thing. Any 10si would be considered one wire capable.

[ShawnAgne]

Neither one charges, bought them both at Auto Zone. But then they both are hooked up the same exact way. Being the first time I've done this and looking like they are 3 wires I'm betting on the monkey hooking the stuff up under the hood.