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TROUBLESHOOTING
Electrical Circuits
Page 11-8 2000 FE290 Gasoline Vehicle Maintenance and Service Supplement
11
GENERATOR CIRCUIT
The generator circuit consists of the starter/generator, voltage regulator, solenoid, battery, and connecting
wires (Figure 11-4, Page 11-8).
When battery power is first supplied to the starter/generator, the starter/generator turns the engine at low
RPM (approx. 700). Once the engine starts running, it then drives the starter/generator. At any engine RPM
over 1215 (3000 starter/generator RPM), the starter/generator functions as a generator, supplying charging
current to the battery. To prevent battery overcharging, the voltage regulator senses battery voltage, and by
opening and closing an electronic switch, controls the amount of charge going to the battery.
ENGINE IGNITION CIRCUIT
The engine ignition circuit is independent of all other circuits except the kill circuit. It consists of the ignition
coil with internal igniter, spark plug, RPM limiter, and connecting wires (Figure 11-5, Page 11-8).
Figure 11-4 Generator Circuit
Figure 11-5 Engine Ignition Circuit
SOLENOID
FRAME
GROUND
ENGINE
STARTER /
GENERATOR
F2
DF
F1
A2
A1
WHITE
BLACK
WHITE
BATTERY
BL
AC
K
RED
RED
GRE
EN
VOLTAGE
REGULATOR
YELLOW
YELLOW
BLACK
RED
BLACK
GROUND
RPM LIMITER
IGNITION COIL
WITH IGNITER
SPARK PLUG
ENGINE KILL
WIRE
BULLET
CONNECTOR
BULLET
CONNECTOR