Components

E34

E35

E39

E40

E43

E44

M05

M13-3

M18

Connectors

E/R-E

E/R-J

I/P-B

I/P-H

I/P-L

I/P-M

Generator (L,S)(I4)

Generator (B+)(I4)

Generator (L,S)(V6)

Generator (B+)(V6)

Generator (L, S) (Diesel)

Generator (B+) (Diesel)

Joint connector

ETACM

Ignition switch

Location reference-page

Circuit Description

The generator generates AC voltage in its windings as

it is belt-driven by the engine. The rectifier converts

this AC voltage to DC voltage.

The voltage regulator, a component which is included

in the generator frame, has a primary function of

controlling the generator's output to meet electrical

system requirements. The regulator also controls

the charge warning lamp.

Fuse 19 supplies battery voltage to the charge warning

indicator. With the engine not running and the ignition

switch in ON, terminal L of the regulator is grounded

internally and the indicator lights up. A small amount

of current provided by both the charge warning lamp

and the pre-excitation resistor is used to "excite" the

magnetic field windings to start the charging process.

With the engine running and the generator charging,

terminal L voltage rises and the indicator lamp goes out.

If the generator fails to charge, terminal L remains below

battery voltage and the indicator lamp remains lit.