C.E. Niehoff & Co. A2-321, A2-322 User Manual
A2-321 and A2-322 Regulators
.
C. E. Niehoff & Co
BRUSHLESS ALTERNATORS
w/Extended Wiring Harness
Troubleshooting Procedures
To troubleshoot the A2-321 or A2-322 regulators with extended wiring harness (see Figure 1 or 2):
1. Make sure all connections follow Figure 1 or 2 for appropriate harness.
2. A2-321 only: In 6-pin harness connectors, make sure pin A is lined up with notch on connector. See Figure 2.
2. Check condition of fuse(s). Replace if necessary.
3. Disconnect extended harness from the alternator harness, regulator connector, 2-pin connection to vehicle, and two
wires from regulator.
CAUTION
Use a DMM set on continuity check or diode test to check the continuity of all end-to-end connections, including
2-pin connector.
4. If necessary, connect regulator directly to alternator-to-regulator harness to verify operation without extended
harness. Jumper vehicle harness as indicated by manufacturer.
Mating connector included
Ensure extended harness is completely disconnected from alternator, regulator, and vehicle harness to
prevent accidental connection and shorts, damaging components.
Orange wire from REG/IGN source to pin A
with harness
in 2-pin connector
➛
Harness includes 20 A slow-blow
fuse (Bussman MDA20 or equiv.)
➛
4 places—#10-32 screws
torque to 8.5 Nm/75 lb. in.
➛
Approx. 72 in. or 80 in.
Green wire from
pin A (IGN source)
in 2-pin connector
to IGN terminal on regulator—
torque to 3.4 Nm/30 lb. in.
Red wire to NO-CHARGE input into pin B in 2-pin
connector
4 places—1/4-20 screws and
lockwashers (provided)
torque to 8.5 Nm/75 lb. in.
➛
➛
➛
P terminal on
regulator is not
used in Gillig
applications
➛
➛
CONNECTIONS
ÿ
AB–
BF+
ÿ
CF–
ÿ
D Phase (AC)
ÿ
EB+
ÿ
➛
Diagnostic LED
White wire from pin B
(D+ Multiplex input)
in 2-pin connector
to D+ terminal on regulator—
torque to 3.4 Nm/30 lb. in.
C701/C701A
Alternator-to-Regulator
Harness Plug
Figure 1 – A2-322 Regulator Remote Mount with Extended Alternator Wiring Harness
TG0038APage 1 of 2
Mating connector included
with harness
Harness includes 20 A slow-blow fuse
(Bussman MDA20 or equiv.)
in each fuse holder
➛
➛
Orange wire from REG/IGN source to pin A
in 2-pin connector
➛
Red wire to NO-CHARGE input into pin B in 2-pin
connector
4 places—#10-32 screws
torque to 8.5 Nm/75 lb. in.
➛
4 places—1/4-20 screws and
lockwashers (provided)
torque to 8.5 Nm/75 lb. in.
➛
P terminal on
➛
regulator is not
used in Gillig
applications
➛
Diagnostic LED
Two lengths available —
Approx. 72 in. or 88 in.
to IGN terminal on regulator—
Green wire from
pin A (IGN source)
in 2-pin connector
torque to 4.5 Nm/40 lb. in.
➛
CONNECTIONS
➛
White wire from pin B
(D+ Multiplex input)
in 2-pin connector
to D+ terminal on regulator—
torque to 4.5 Nm/40 lb. in.
AF–
ÿ
B Phase
ÿ
CB–
ÿ
DB+
ÿ
ED+
ÿ
FF+
ÿ
C703/C703A
Alternator-to-Regulator
Harness Plug
Figure 2 – A2-321 Regulator Remote Mount with Extended Alternator Wiring Harness (Two Lengths)
C. E. Niehoff & Co. • 2021 Lee Street • Evanston, IL 60202 Tech Services Hotline 800-643-4633
TG0038APage 2 of 2
Loading...