Concord L6-258 4.2L VIN C 2-bbl (1982)
Generator: Testing and Inspection
Fig. 4 Grounding field windings
UNDERCHARGED BATTERY
1.
Disconnect battery ground cable.
2.
Disconnect wire at BAT terminal of alternator, connect ammeter, positive lead to BAT terminal and negative lead to wire.
3.
Connect battery ground cable.
4.
Turn on all accessories, then connect a carbon pile regulator across battery.
5.
Operate engine at moderate speed, adjust carbon pile regulator to obtain maximum current output.
6.
If ammeter reading is within 10 amps of rated output, alternator is not at fault. Alternator rated output is stamped on alternator frame.
7.
If ammeter reading is not within 10 amps of rated output, ground field winding by inserting screwdriver in end frame hole, contacting tab. Do not
insert screwdriver deeper than one inch since tab is usually located within {3-4} inch of casing surface.
8.
If reading is within 10 amps of rated output, regulator must be replaced. If reading is not within limits, check field winding, diode trio, rectifier
bridge and stator.
9.
Turn off all accessories and disconnect ammeter and carbon pile regulator.
Fig. 5 Testing voltage regulator
IN-VEHICLE VOLTAGE REGULATOR TEST
1.
Connect voltmeter and fast charger to 12 volt battery as shown.
