C.E. Niehoff & Co. N1234-1 Installation
C. E. Niehoff & Co.
BRUSHLESS ALTERNATORS
Make connections as shown
on this page.
Regulator
connector
If this ignition lead (568)
is provided, remove it
and install supplied
connector cap to
lead connector
(568A) as shown
to prevent exposure
to environment
Vehicle harness
Regulator - AC terminal
Connector cap
568A
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5A
N1234-1 Alternator / N3121 Regulator
OEM Wiring Connections
Installation Instructions
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568
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2A
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Boots
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Washer
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Regulator - ENERGIZE terminal
Washer
Locknut, #10-24;
torque to 2.3 Nm / 20 lb.in.
Nut, 0.2500 - 20;
torque to 2.8 Nm / 25 lb.in.
Figure 1a - N3121 Regulator Wiring Connections
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N1234-1
Alternator
Figure 1- N1234-1 Alternator
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Positive terminal on alternator
Washer
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Figure 1b - Positive Terminal Connections
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Fuselink
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Terminal on
Vehicle “B+” lead
Ground terminal
on alternator
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Insulator
Washer
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Lockwasher
Washer
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Lockwasher
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Terminal on
vehicle ground lead
Figure 1c - Ground Terminal Connections
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Nut, 0.3125-18 UNC-2A;
torque to 1.13 Nm / 10 lb.in.
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Nut, 0.3750-16;
torque to
1.69 Nm / 15 lb.in.
C. E. Niehoff & Co. • 2021 Lee Street • Evanston, IL 60202 Tech Services Hotline 800-643-4633
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