Alternator wiring using C5/C6 Corvette Alternator

[gnvair]

I am using the Corvette alternator that uses the 4 pin connector (although the alternator only has 3 pins).
Pin terminal B is the wire to the pcm.
What do I do with the original 2 wires from the vehicle (78 Malibu)?
I know one is 12 volts and runs to the starter. Car has factory voltmeter and no warning light.

 

[UC645]

I’m glad I still had this website saved:

Almost ALL the late GM Alternator Information you could need!!

ALTERNATOR INFORMATION. So let's get this ironed out now. I see so many questions about alternators, and honestly, I see a LOT of wrong answers. I'm not the most informed on the situation, but I will share all the data I have to help some of you guys out. The LS engine came with many different...

speedmaxinnovation.com

All you should need to do is connect your volt gauge wire to the L terminal on the alternator pigtail, and you’re done. I’ve got a 244 on mine and that’s all it needs.

As for the wire going to the starter, I would eliminate it. It shouldn’t be needed to run this setup.

 

[Supercharged111]

I’m glad I still had this website saved:

Almost ALL the late GM Alternator Information you could need!!

ALTERNATOR INFORMATION. So let's get this ironed out now. I see so many questions about alternators, and honestly, I see a LOT of wrong answers. I'm not the most informed on the situation, but I will share all the data I have to help some of you guys out. The LS engine came with many different...

speedmaxinnovation.com

All you should need to do is connect your volt gauge wire to the L terminal on the alternator pigtail, and you’re done. I’ve got a 244 on mine and that’s all it needs.

As for the wire going to the starter, I would eliminate it. It shouldn’t be needed to run this setup.

I'm guessing that commands it to 100% all the time?

 

[78Delta88]

Wire coming from starter is the sense wire. Remove it's connection from the starter and connect it to the nut on the back of the alternator.

 

[UC645]

I'm guessing that commands it to 100% all the time?

I’m not sure actually. Being internally regulated and activated by one wire, I imagine there’s some sort of load sensing capability in the more modern alternators. Again, I’m not sure, I just know it charges if you have the exciter wire hooked up.

I’m not sure if the sense wire could be hooked up, I haven’t tried it, nor found any info on it when I was doing the swap.

 

[78Delta88]

The CS130 and AD244 self initiates after startup and threshold RPM reached.

The earlier 10SI and 12SI needs the "I" wire. This is the initiator or "exciter wire". Common on the 1978 wire loom. The sense wire came all the way from the starter junction from OEM, with the idea it would be more accurate from that distance to "sense" voltage drop,... I.E.: current "load".

On the GM you will notice it really doesn't need that, so all you do is loop it with a large ring connector to the output which is the zinc plated 3/8 nut on the back of the alternator.

 

[78Delta88]

That's a good question. On the ECM monitored systems, the ECM monitors load and modulates the alternator output based off of what the ECM senses.

Hmmm..., maybe it will be at 100%? Not sure. Something to investigate, don't want to have bad advice floating about. I just reviewed the Delco Remy course and didn't specifically discuss.

 

[78Delta88]

This is example of alternator with the correct conversion connector for CS130.

 

[78Delta88]

Some basics. The CS130 self senses internally

This video demonstrates conversion from 10/12SI series to the CS style.

 

[78Delta88]

Lengthy read but this one goes through all the hookups.

Dirty Dingo Motorsports

LS Conversion LS Swap

www.dirtydingo.com