Nissan Sentra/Pulsar/NX 1982-1996 Repair Guide

Alternator

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TESTING



The main reason for charging system problems is dirty, damaged or loose battery cables or alternator wiring. Always check these problems before going further. After eliminating these causes, a no charge condition usually is the fault of the IC regulator or worn brushes. The brushes have wear indicator lines. If the brush is near or at the indicator, the brush will not contact the rotor slip rings and cause a no charge condition.

REMOVAL & INSTALLATION



See Figures 1, 2 and 3



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Fig. Fig. 1: Unfasten the alternator mounting bolts



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Fig. Fig. 2: Detach the electrical connector ...



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Fig. Fig. 3: ... and disconnect the lead wires

The alternators for Pulsar and Sentra have not changed much over the years. However, the 1987-88 alternators for Pulsar and Sentra have a different internal diode assembly.

  1. Disconnect the negative battery terminal.
  2.  
  3. Disconnect the 2 lead wires and connector from the alternator.
  4.  
  5. Loosen the drive belt adjusting bolt and remove the belt.
  6.  
  7. Unscrew the alternator attaching bolts and remove the alternator from the vehicle.
  8.  

To install:
  1. Install the alternator and retaining bolts loosely.
  2.  
  3. Install the belt and connect the wiring.
  4.  
  5. Adjust the belt as outlined in General Information & Maintenance . Torque the retaining bolts to 25 ft. lbs. (34 Nm).
  6.  

 
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