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I.
Be sure the shunts are tightly secured to the Battery Amps Adaptor
as shown in Key No. I Page 5 , and the Function Selector Switch is
placed in the Alternator position.
CAUTION: TIGHTEN ALL NUTS ON THE BATTERY ADAPTOR WITH A WRENCH TO
AVOID EXCESSIVE HEAT AND POSSIBLE SHUNT DAMAGE.
IF YOU ATTEMPT TO
START THE ENGINE WITH THE SHUNT DISCONNECTED, THE 1/40HM
RESISTOR
MOUNTED ON THE BATTERY ADAPTOR MAY BLOW OUT.
2.
Start the engine, then carefully disconnect the slotted ends
of the shunts as shown in the figure below.
Turn the headlights
on and operate the engine at approximately 1200 RPM and observe the
alternator condition scale.
3. A reading in the RED GOOD ZONE on the meter indicates that the
alternator windings and diodes are satisfactory.
4.
A reading in the GRAY DEFECTIVE ZONE indicates that one or more
diodes are open or shorted or that the stator winding is open or
shorted to ground or has shorted turns.
Refer to Tests 9 and 10
Alternator Diode, Statorand
Rotor Tests for further testing.
IMPORTANT: Refer to vehicle specifications to determine whether type
"A" or type "B"system is on the vehicle,
Also check the rated output of
alternator on the nameplate or specifications listing,
1.
To perform this test, it is necessary to ground the field in the
type A Circuit or remove the regulator from the charging system and
energize the field in the Type B Circuit.
This provides full field
operation and the alternator will charge at its maximum rated capacity,
2.
Place the FUNCTION SELECTOR Switch in the VOLTS position and slide
the Center Slide Switch to the AMPS CHARGING position.
3,
On the Type A Circuit, ground the field as shown on page 12, proceed
with Step 5 below.
4.
On the Type B Circuit, disconnect the wiring harness plug from the
regulator and energize the field as shown on page 13.
5.
Before starting the vehicle, be sure the shunts are connected to the
Battery Amps Adapter as shown in Key No. I on page 5
•
Turn
on the headlights and set blower speed to high.
The meter should
read to the left of zero or "backwards".
If it reads up scale, re-
verse the shunt connections as shown in Figure 1 5.
Turn all lights and accessories "OFF".
Start the engine and operate
it at the speed recommended by the manufacturer for alternator
output test.
Unless otherwise specified, adjust engine speed as follows:
Chrysler
1250 RPM
GM-Delco-Remy
2500 RPM
Ford
2900 RPM
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