Advertisement
•
PART
13-1-GENERAL CHARGING SYSTEM SERVICE
13-7
EJ
TESTING PROCEDURES
TESTING THE ALTERNATOR
SYSTEM
Before any tests are made on the
alternator or regulator the battery
should be checked and the circuit
inspected for faulty wiring or insu-
lation, loose or corroded connec-
tions
and
poor
ground circuits.
Cheek alternator belt tension to be
sure the belt is tight enough to
prevent slipping under load.
Any
unfavourable conditions noted in the
inspection should be corrected be-
fore ·proceeding.
NOTE: THE IGNITION SWITCH
SHOULD
BE
OFF
AND THE
NEGATIVE
BATTERY
CABLE
DISCONNECTED
FROM
THE
BATTERY
BEFORE
MAKING
ANY
TEST
CONNECTIONS.
FAILURE TO OBSERVE THESE
STEPS MAY RESULT IN DAM-
AGE TO THE SYSTEM.
1.
BATTERY TEST:
Test the battery with a hydro-
meter. If not fully charged it should
be placed on charge or a fully
t'harged battery temporarily instal-
led for test purposes.
FIG. 7- Test Connector
ALTERNATOR TESTS
Make an alternator output test
before testing the Voltage Regula-
tor.
Use care when connecting any
test equipment to the alternator
system, as the alternator output
terminal is connected to the battery
at all times.
Circuits for testing alternators and
regulators are shown in Figures 10/11
and 27/35
.
ALTERNATOR OUTPUT TEST-
ON ENGINE
When the alternator output test
is conducted off the car, a test bench
must be
used.
Follow the procedure
given by the test bench equipment
manufacturer. When the alternator
is removed from the car for this
purpose always disconnect a battery
cable as the alternatol' output con-
nector is connected to the battery
at all
times.
NOTE: To prevent short circuiting during
testing operations it js essential that a test
connector shown in
Fig.
7 be
used.
A variable load such as a Carbon pile
rheostat must be available to place across
the
battery.
A switched lamp bank of 800 Watt
capacity is a
suitable substitute for a
carbon pile
.
ALL OUTPUT TESTING IS TO
BE
MADE
WITH
THE
ALTERNATOR
WARM
.
RUN
ALTERNATOR
ON
FULL
LOAD FOR 5 MINUTES PRIOR TO
MAKING
TESTS.
BOSCH
1. Ensure that the ignition
is
switched off.
2.
Disconnect the battery earth
cable.
3. Remove the connector plugs
from the alternator main (B+) and
field terminals (DF and D+
).
4. Install the main terminal of the
test connector to the alternator B+
terminal and one lead to the DF
terminal of the alternator
(Figs. 8
and 10).
5. Connect one lead
of the test
connector to the +
(Red)
lead
of a
moving coil, 0
-
60 amp ammeter
,
connect the
-
(Black) ammeter lead
to the B+ terminal in the wiring
harness.
6.
Connect the positive lead
of
a
good quality voltmeter to the test
connector aml the negative lead to
ground
.
7. Replace the battery earth cable.
8. Connect the carbon pile rheo-
Advertisement
