PB 150 V8-318 5.2L VIN T 2-BBL (1983)
Generator: Testing and Inspection
Bosch & Nippondenso Alternators
Alternator Output Wire Resistance Test
Fig. 1 Alternator output wire resistance 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 wire of a suitable voltmeter to disconnected "B+" lead wire, then connect negative lead to battery positive post.
Remove air hose between Single Module Engine Controller (SMEC) and air cleaner, then ground one end of a suitable jumper wire and probe
green R3 wire on dash side of black 8-way connector. Use caution not to ground J2 wire of 8-way dash connector. Both R3 and J2 wires are green
on alternator side of wire connector. On dash side of connector, R3 wire is green, while J2 wire is blue.
Connect a suitable engine tachometer, then reconnect battery ground cable.
Connect a variable carbon pile rheostat to battery terminals, ensuring carbon piles are in "open" or "off" position.
Start engine and operate at idle speed, then adjust carbon pile and engine speed to maintain a 20 amp circuit flow. Note voltmeter reading.
Voltmeter reading should not exceed .5 volt.
If a higher than specified voltage drop is indicated, clean and tighten all connectors in charging circuit. A voltage drop test may be performed at
each connector to locate point of excessive resistance.
If charging circuit resistance test was satisfactory, disconnect battery ground cable, then the ammeter, voltmeter and carbon pile.
Remove jumper wire.
Connect battery ground cable, then the hose between SMEC and air cleaner.
Current Output Test