The right way to Join a GM CS-130D Model Alternator in Place of an Authentic CS130

The right way to Join a GM CS-130D Model Alternator in Place of an Authentic CS130


I’ve been in search of how you can wire a CS-130D alternator instead of my CS-130. I got here throughout your article on how you can hook up a brand new alternator instead of the previous one. However the article ended earlier than I acquired a full reply. I’ve a 1993 Corvette that I’m swapping in an LQ4 truck engine.

For the reason that wires on the brand new plug are far too small to conduct the output I assume it’s dealt with by the principle energy lead (massive purple cable on the again of the alternator). That leaves the 4 small wires on the plug. They’re blue, inexperienced, yellow and white. Additionally the plug has no markings on it. Are you able to give me a route to go on this? Thanks.



The story that this reader is referencing is a chunk I did for a web-based publication. The story outlined the several types of plug-in connectors utilized by GM. Primarily there are 4 several types of alternators courting again to the primary ones utilized by GM in 1962. However we’ll focus right here on the distinction between the final two variations. The CS-130 appeared within the mid Eighties. This alternator is definitely an ideal replace for earlier GM alternators.

In B.J.’s case, he must replace from the CS-130 to the CS-130D model which was utilized in most Gen. III LS engines. The CS-130D makes use of a unique four-wire plug-in connector.

His first query issues the output connection which is definitely the massive put up terminal with a stud and nut association. That is the place the ability is distributed from the alternator and ought to be related with a 6 or 8 AWG massive diameter energy lead from this terminal on to the constructive put up on the battery. Utilizing a big diameter wire permits the alternator to ship its most present to the automobile’s electrical system. Most inventory CS-130D alternators had been 105 amp fashions with some vans and different automobiles outfitted with 145 amp variations.

Addressing his subsequent query, the connector for the CS-130D is barely completely different than the CS-130. Every of those wires ought to be labeled, if not on the connector itself then straight on the alternator. The accompanying illustrations ought to enable you to with the conversion. For the CS-130D, there are 4 connections labeled ”S”, “I”, “L” and “P.”

In your case, Powermaster makes an adapter harness that provides a direct plug-in into the CS130D alternator with the opposite finish the right connector to just accept the unique 1993 Corvette alternator wiring harness. This makes the replace to the later mannequin alternator extraordinarily simple. That connector is an element quantity is PWM-161.

However let’s additionally assist these readers who could also be excited by an LS swap right into a Sixties or Seventies GM automobile like a Camaro, Chevelle, Nova, or pickup and need to use the CS-130D alternator. On this case, the best step is to make use of a generic connector to plug into the CS-130D alternator. We discovered a connector pigtail within the Customary Merchandise line below half quantity HP4695 with 4 white wires exiting the plug.

To transform this alternator to be used in an early GM automobile, there are solely two connections that must be made. The “I” terminal could be related to switched ignition below the sprint. The second connector could be the “L” for a charging warning mild on the sprint. For those who select to not use a warning mild, it’s finest to attach a 50 ohm resistor into this circuit related to a switched ignition supply to permit the alternator to perform correctly. We’ve been instructed that if the resistor will not be used, this may finally fritter away the interior voltage regulator, so it’s finest to make use of the warning mild circuit or at the least the right resistor.

It will permit the usage of this excessive output alternator with most all LS engine swaps and all will probably be proper with the world.

At the very least so far as your charging system is anxious.

The connector on the left is a sq. kind connector for the sooner CS130 type alternators. The connector on the appropriate makes use of radiused corners and is meant for the CS-130D mannequin alternator s used on LS engines. (Picture/Jeff Smith)
This can be a generic 4 wire, CS130D pigtail that has 4 white wires. The one two which might be required are those for the “I” and “L” connectors. This connector is a Customary Ignition Merchandise piece out there below half quantity SMP-HP4695. (Picture/Customary Motor Merchandise)
This illustration reveals the place of the 4 wires and their labels. The I and L positions are clearly marked in reference to the clip. (picture/Jeff Smith)

Jeff Smith has had a ardour for vehicles since he started working at his grandfather’s gasoline station on the age 10. After graduating from Iowa State College with a journalism diploma in 1978, he mixed his two passions: vehicles and writing. Smith started writing for Automotive Craft journal in 1979 and have become editor in 1984. In 1987, he assumed the function of editor for Scorching Rod journal earlier than returning to his old flame of writing technical tales. Since 2003, Jeff has held varied positions at Automotive Craft (together with editor), has written books on small block Chevy efficiency, and even cultivated a formidable assortment of 1965 and 1966 Chevelles. Now he serves as a daily contributor to OnAllCylinders.


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December 2022