C.E. Niehoff & Co. N1610-1 Installation
28/14 V applications
(see other side for 28 V):
Connect as shown on this page.
N1610-1 Alternator / N3247 Regulator
Boots (2)
Locknut, #10-24;
torque to 3.4 Nm / 30 lb.in.
Washer
Regulator - AC terminal
28/14 V or 28 V
Wiring Connections
Installation Instructions
Locknut, 0.250-20;
torque to 3.4 Nm / 30 lb.in.
Washer
Regulator - IGN terminal
Alternator connector
Figure 1- N1610-1 Alternator
B+ connections on alternator
Bolt, 0.3750-16 UNC-2A; torque to 20 Nm / 15 lb.ft. when securing positive cable of suitable size for output power. Both
positive cables must be connected together at battery positive potential when alternator is installed in vehicle and during
operation. Cable as shown must be used as part of vehicle cabling.
Lock washer
Positive cable
from vehicle
B– connections on alternator
Bolt, 0.3125-18 UNC-2A; torque to
9 Nm/80 lb. in. when securing B– cable
of suitable size for output power. Both
ground cables must be connected to
vehicle’s common ground using interconnect cable B– plus cable of suitable
size as part of vehicle cabling when
alternator is installed in vehicle and
during operation.
Lock Washer
Washer
Vehicle
harness
Page 1 of 2
Boot
Vehicle
harness
Washer
Nut, 0.312-18 UNC-2B;
torque to 5.6 Nm / 50 lb.in.
Figure 1a - N3247 Regulator Wiring Connections
Interconnect
cable
Washer
B+ output terminals
Figure 1b - B+ and B– Terminal Connections
J1939 connector
AC connector
Regulator - 14 V terminal
Lock washer
Washer
Positive cable from vehicle
Secure alternator mounting
lug to vehicle using hardware
specifi ed by vehicle manufac-
turer and torque suffi cient to
withstand weight of alternator.
MS21245-L12 nut;
torque to 163 Nm/
120 lb. ft. when
installing drive pulley.
Washer
Secure alternator mounting
lugs to vehicle using hardware
specifi ed by vehicle manufac-
turer and torque suffi cient to
withstand weight of alternator.
II0160A
28V applications
(see other side for 28/14 V):
Connect as shown on this page.
Boots (2)
Locknut, #10-24;
torque to 3.4 Nm / 30 lb.in.
Washer
Regulator - AC terminal
Locknut, 0.250-20;
torque to 3.4 Nm / 30 lb.in.
Washer
Regulator - IGN terminal
Alternator connector
J1939 connector
AC connector
Figure 2- N1610-1 Alternator
B+ connections on alternator
Bolt, 0.3750-16 UNC-2A; torque to 20 Nm / 15 lb.ft. when securing positive cable of suitable size for output power. Both
positive cables must be connected together at battery positive potential when alternator is installed in vehicle and during
operation. Cable as shown must be used as part of vehicle cabling.
Lock washer
Positive cable
from vehicle
B– connections on alternator
Bolt, 0.3125-18 UNC-2A; torque to
9 Nm/80 lb. in. when securing B– cable
of suitable size for output power. Both
ground cables must be connected to
vehicle’s common ground using interconnect cable B– plus cable of suitable
size as part of vehicle cabling when
alternator is installed in vehicle and
during operation.
Lock Washer
Washer
Vehicle
harness
Washer
Washer
Nut, 0.312-18 UNC-2B;
torque to 5.6 Nm / 50 lb.in.
Regulator - 14 V terminal
Figure 2a - N3247 Regulator Wiring Connections
Interconnect
cable
B+ output terminals
Lock washer
Washer
Positive cable from vehicle
Secure alternator mounting
lug to vehicle using hardware
specifi ed by vehicle manufac-
turer and torque suffi cient to
withstand weight of alternator.
MS21245-L12 nut;
torque to 163 Nm/
installing drive pulley.
Washer
Secure alternator mounting
lugs to vehicle using hardware
specifi ed by vehicle manufac-
turer and torque suffi cient to
withstand weight of alternator.
120 lb. ft. when
Figure 2b - B+ and B– Terminal Connections
C. E. Niehoff & Co. • 2021 Lee Street • Evanston, IL 60202 Tech Services Hotline 800-643-4633
Page 2 of 2
II0160A
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