C.E. Niehoff & Co. C702D Troubleshooting Guides - Manual (Page 2)

Page 2 TG65A
Section A: Wiring Diagram
CEN C702D Alternator
Description and Operation
C702D 28 V, 350 A alternators are internally
rectified. All windings and current-transmitting
components are non-moving, so there are no brushes
or slip rings to wear out. Energize switch activates
regulator. Field coil is then energized. Regulator
maintains alternator output voltage at regulated
setting as vehicle electrical loads are switched on
and off. Alternator output current is self-limiting
and will not exceed rated capacity of alternator.
A2-332 regulator furnished with most units
has D+ terminal that can provide signal to
vehicle electrical system, confirming alternator
operation. Regulator also has a P terminal that
can provide an optional AC voltage tap.
Regulator also provides overvoltage
cutout (OVCO). Regulator also has a
tri-color LED (see page 4).
Figure 2 — C702D Alternator with Regulator
B– Terminal
(either side)
B+ Terminal
D+ Terminal
IGN Terminal
Figure 1 — C702D
P Terminal
LED