Plymouth Workshop Manuals
PB 150 V8-318 5.2L VIN T 2-BBL (1983)
Starting and Charging > Charging System > Generator <--> [Alternator] > Component Information > Testing and Inspection > Bosch & Nippondenso Alternators > Page 2787
Fig. 2 Alternator current output test. Bosch & Nippondenso alternators
Disconnect battery ground cable.
Disconnect "B+" lead at alternator output terminal.
Connect a 0-150 amp D.C. ammeter in series between alternator "B+" terminal and disconnected "B+" lead wire.
Connect positive lead of a suitable voltmeter to "B+" terminal of alternator, then connect negative lead to a suitable ground.
Connect a suitable engine tachometer, then reconnect battery ground cable.
Connect a variable carbon pile rheostat between battery terminals, ensuring carbon piles are in "open" or "off" position.
Remove air hose between Single Module Engine Controller (SMEC) and air cleaner, then ground one end of a suitable jumper wire and probe
Start engine and operate at idle speed, then adjust carbon pile and engine speed in increments until a speed of 1250 RPM at 15 volts is obtained.
Note ammeter reading. Ammeter reading should be within specified limits noted in specification charts in individual truck chapters.
If reading is less than specified, alternator is defective.
After completion of current output test, turn off carbon pile and ignition switch, then disconnect battery ground cable.
Remove ammeter, voltmeter, tachometer and carbon pile, then reconnect "B+" lead to alternator output terminal.
Disconnect jumper wire, then connect air hose from SMEC to air cleaner.
Connect battery ground cable.
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