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All Technical Service Bulletins for Voltage Regulator: > < Diode Trio, Alternator|Description and Operation
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Voltage Regulator: Customer Interest
Charging System - Abnormal Operation

Number:

84-140

Section:

6E (VIy)

Date:

June, 1984

Subject:

ABNORMAL CHARGING
SYSTEM OPERATION

Model and Year: 1983-84 CHEVROLETS

TO:

ALL CHEVROLET DEALERS

CONDITION

Abnormal charging system operation can result in:

a.

An overcharge of the battery and possible electrolyte leakage, or

b.

An undercharge resulting in a low battery state of charge.

CAUSE

These conditions may be caused by a faulty voltage regulator.

CORRECTION

Voltage regulators produced after approximately April 1, 1984 are identified with a letter "L" adjacent to the regulator terminals. These
should be used in all 1983-84 alternator repairs.

All Technical Service Bulletins for Voltage Regulator: > < Diode Trio, Alternator|Description and Operation