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To Excite a Delco S-10 Alternator

K

KCTractors

Member
Location
Central Wi
Is there a way you can excite a Delco alternator manually with a switch or something in that order. This is on Allis Wd and you have to give it full throttle to excite the the alternator.
 
I usually start with a nice glass of wine, then a nice dinner and a movie. At the right moment, go full throttle and hope.

On my Allis WC I went to a much smaller alternator pulley due to the fact that the tractor idles somewhere around 350rpm. That was a lot easier than the dinner and a movie. Its been that way since 1999 and works fine running 2 big 12V batteries that run a Western plow on the front.

Rick
 
You must have it wired with 1 wire. If you wire it with 3 wires it will excite from battery power.

Use a short piece of wire and run it from the large battery post on the alternator to the #2 spade plug. This will prevent it from over charging.
Now run a wire from the switched side of the key (power only with key on) to the #1 spade post on the alternator. This will excite the alternator with battery power when the key is on.
You will have to install a one way diode or a dash warning light in this wire to keep the alternator from back feeding threw this wire.
 
If it is a 1 wire yes no or maybe. I have found on the 1 wire types yep high RPM to start them working. On some you can pull the cover plug where the 2 wire plug goes and hook a wire to the #1 and then jumper it just for a moment to the charge post on the alternator and that will turn them on. Note it does not work on them all I know because I have had some that it worked on and some it did not. If you have a 3 wire then you may have it wired wrong or have a resister in the #1 wire that is to big or a light bulb that is to big
 
It is a three-wire, is wired the way you guys said, but does have a 12 gauge wire going to switch with the idiot light, maybe the wire is to heavy.
 
The idiot light has to be a certain resistance for it to work. I have seen some guys put a push button in the circuit to excited the alternator. The push button switch was a momentary switch, only on when it's pushed in".
 
No the wire. As a matter of fact the larger the wire the less resistance it will have. I bet if you installed a radio shack diode 276-1661 silver line toward the alternator in place of the light bulb it would charge at lower RPM or use a small lower watt bulb
 
You can buy a light socket with a bulb (6 or 12 volt) at napa or any parts store that you can put in line to excite the alternator.Napa has the small ones with a push in bulb,like a clearance light.
 
Had this same problem with 1-wire delco i installed recently--talking to shop guys about it & they said they now have a newer self-excite reg.[ac?] that will start working @ less than 500rpm.- will letya know----
 
the problem is probably not exciting the alt ,its simply that a alternator needs to be turned at a higher rpm to produce. a smaller pulley may help some, but thats fairly normal.all of mine do this exact thing.
 
3 wire hookup is the proper and best way. All I have ever used in the excite circuit is a 194 bulb and usually a side marker light socket from a junker.

Light on, it's not charging, light off it's charging, simple.
 
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