C.E. Niehoff & Co. N1128, N3212 User Manual
C. E. Niehoff & Co
.
BRUSHLESS ALTERNATORS
N1128 Alternator / N3212 Regulator
OEM Wiring Connections -
Dual Voltage
Installation Instructions
DUAL VOLTAGE (28 V/14 V) applications:
1. Connect as shown.
2. Support harnesses
within 5” of regulator.
Regulator
receptacle
Regulator – “AC” T
Vehicle harness
Figure 1 – N3212 Regulator Dual Voltage Wiring Connections
erminal (optional)
Washer
Locknut, #10-24;
torque to 3.4 Nm / 30 lb.in.
W
W
W
N3212
Regulator
W
V
W
connector cap
Regulator –
W
W
W
V
Phase
“+14V”
terminal
W
W
W
V
Regulator – “IGN” Terminal
Washer
Nut, 1/4-20; torque to
Boots (p/n N9464,
supplied in
envelope assembly)
Vehicle harness
W
(to +14V battery)
Boot (p/n N9564,
W
Nut, 5/16-18 UNC-2B;
torque to 5.7 Nm / 50 lb.in.
Washer
3.4 Nm / 30 lb.in.
supplied in
envelope assembly)
W
W
Figure 2– N1128 Alternator
V
Figure 2a – Positive Terminal Connections
Terminal on
vehicle ground lead
Figure 2b – Ground Terminal Connections
+28 V Positive Terminal
on alternator
Washer
Belleville
V
V
W
washer
W
Terminal on
Vehicle “B+” lead
Ground Terminal
on alternator
V
V
Washer
W
Belleville washer
V
torque to 15 Nm / 11 lb. ft.
M10 x 1.5 Bolt;
torque to
15 Nm / 11 lb.ft.
Boot (p/n N9564,
supplied in
envelope
assembly)
V
M8 x 1.25 Bolt;
C. E. Niehoff & Co. • 2021 Lee Street • Evanston, IL 60202 Tech Services Hotline 800-643-4633
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II0048B
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