ALTERNATOR REGULATOR

ELECTRICAL

Each model regulator is designed for use on only one

ALTERNATOR REGULATOR

polarity system. Note the marking on the regulator

base, or refer to the Specification Listing to determine

A. GENERAL (Fig. 17)

the polarity.

The voltage regulator is shown in Figure 18. This

A typical wiring diagram showing internal circuits of the

regulator has four terminals. The terminals are of the

regulator is illustrated in Figure 19.

slip-connection type, and a special connector body of

the vehicle wiring harness is keyed to mating slots in the

regulator base to insure proper connections. Also, a

projection on the connector body serves to latch the

assembly together. This prevents disconnections due to

vibration. The assembly can be disconnected by lifting

the latch slightly. (Fig. 18)

Figure 19.

Following is a description of the operation of units in this

circuit. (Fig. 1) When the ignition switch is closed,

current flows through a voltage - dropping resistor from

the positive terminal of the ignition coil to terminal 4 of

the voltage regulator, then out through regulator

terminal F to the field of the alternator. This reduced

field energizing voltage limits the alternator output while

Figure 18.

the engine is cranking. As the ignition switch is moved

to the Start position, current flows through normally

A double contact voltage regulator unit and a field relay

closed contacts (terminals 1 and 2) of the ADLO relay

unit make up the regulator assembly. The voltage

and to the starter solenoid. The engine begins to crank,

regulator unit operates to limit the generated voltage to

while the alternator output is held to a low level by the

a preset value, whereas the field relay connects the

reduced field voltage.

alternator field winding and regulator winding directly to

the battery.

After the engine starts, and as the engine RPM

B-66