AuroraGirl
I'm Awesome
2 are for the computer possibility OR 1 is used for a resisted ignition signal, alternatively, through a 194 warning indicator on a dash(or both if you wire it right). thats needed to excite the alternator to start unless it was an aftermarket with a self-exciting "1 wire" alternator(that would be the charge wire in those ads) but the sense wire is still wise. the tach lead is not used much, but basically usually 1 or 2 of the wires on the 4 pin are used. Some vehicles, 3, like a buick lesabre could, some just 1. somewhere maybe all 4 were used but I doubt it.@AuroraGirl
with the 4 pin alternators, if it's not being controlled by a computer, like on my 1956 case tractor that was a 6 volt but is now converted to 12..... is that one sense terminal the only one that matters? I took off one of these and replaced it with the 2 pin plug type alternator and wired up an indicator light.
so I have this 4 pin plug alternator and dont quite know what I should do with it..... I have not looked anything up as I dont actually need it but I guess I would like to know how to make it work...
if I understand what your saying, then the sense wire should go to the starter solenoid as it's also used as a distribution post.
what are the other 3 wires for? an indicator light? no? computer crap? no?
hell I'd look it up if I really needed to know this but it sounds like you know this info off the top of your head, and that's awesome!
CHEERS! Aurora!
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(cs130d or ad230)
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this shows wiring WITHOUT a PCM controlling, just the standard hookups. the S being wired to the stud on the battery in this photo is done internally, such as you wouldnt need to do that. when you put it elsewhere, it uses that reading. the L terminal is where you need to hook up for your tractor.
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This is my park avenues wiring. The F L terminals are used and wired to the PCM instead of a charge light or resistor(the PCM provides that functionality) and the S is un-used while the P terminal is not listed, its because GM didnt really ever use the alt for a tach I dont think at least often, so it was left off. the line going from the battery to the "Solid state regulator" is the charge wire.
Power dist. cell 10 in the far left is the starter.