Wagoneer V8-360 5.9L VIN N 2-bbl (1983)
Generator: Testing and Inspection
Paris-Rhone Alternators
Troubleshooting
ALTERNATOR LAMP DOES NOT ILLUMINATE WITH IGNITION SWITCH ON
1.
Check if alternator connector is loose or disconnected.
2.
Check ring terminal on alternator case for proper ground.
3.
Ground wide terminal on connector, then check bulb by ensuring lamp lights.
ALTERNATOR LAMP ILLUMINATES WITH IGNITION SWITCH ON
1.
If warning lamp illuminates when engine is operating, a charging system defect is indicated. Check for loose or broken alternator drive belt,
defective alternator or defective regulator.
2.
If regulator voltage is less than 12.5 volts, check for defective diodes, an open stator winding, excessive carbon on slip rings and/or worn brushes.
Testing
ALTERNATOR VOLTAGE TEST
1.
Connect a suitable voltmeter across battery terminals.
2.
Start engine, then increase RPM until voltmeter pointer remains steady. Voltage should be 12.5-15 volts.
3.
Turn on as many accessories as possible with, then recheck voltage reading. Reading should be 12.5-15 volts.
Fig. 2 Testing rotor assembly
ROTOR TEST
1.
Using a suitable ohmmeter, check resistance between the two sections of the rotor slip rings. Take resistance readings at a minimum of four points
around slip rings.
2.
Resistance should be 2.9-3.5 ohms on 60 amp rotor or 3.0-3.6 ohms on 75 amp rotor. If resistance is not as specified, replace rotor.
Fig. 3 Testing stator assembly
STATOR TEST
1.
Using a suitable ohmmeter, check resistance across each stator wire connections.
2.
Connect test leads to wires A and B, then note resistance.
3.
Connect test leads to wires B and C, then note resistance.
4.
Connect test leads to wires A and C, then note resistance.
5.
Resistance across each stator wire should not exceed .1± .01 ohms. on 60 amp stators or .08 ohms ±.008 ohms on 75 amp stators. Replace stator if
