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General Motors CS-130D Series Alternators
The CS-130D can be spotted by the lack of an external fan behind the pulley.
These alternators have an internal fan. They also have a plastic casing on the back.
These alternators have an elongated oval, four pin sealed connector, seen in the photo
on the next page and in the image above. The regulator will be marked P,L,I,S. This
type of alternator was used on many engines, including the GM LS series, Vortec and
Gen. III Vortec truck fuel injected engines.
Of the two remaining wires, a 14 gauge black/red wire printed #995
REGULATOR BATTERY POWER and a 16 gauge black/brown wire labeled #914
ALTERNATOR EXCITER, only the #914 will be used. The #995 may be connected to
the alternator output post or removed from the harness.
Route the black/brown #914 to the
connector on the alternator and cut to
length. Strip ¼” of insulation.
The factory 4 pin alternator connector from
a factory GM harness or a CS-130D pigtail
purchased from Painless, part # 30705 (see
photo), will need to be used.
The CS-130D alternator requires a switched power source to pin I of the
regulator, and a resisted power source on the wire going to pin L of the
regulator. Without this resistance the regulator on the alternator will burn
up. A resistor, splices, and heat shrink, seen on the previous page, have
been provided in the “ALTERNATOR” bag kit. The resistor will simply
need to be installed inline on the L pin wire as shown in the diagrams on
the next page.
Using a splice and heat shrink provided in the “ALTERNATOR” bag kit,
splice the CS-130D pigtail to the black/brown #914 wire according to one
of the diagrams on the next page.
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