Pontiac Fiero 1984-1988 Repair Guide

Regulator

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The voltage regulator is a solid-state, non-adjustable unit integral with the alternator. The alternator must be disassembled to remove the regulator.

Testing or replacing individual components in the alternator is not practical or economical for a do-it-yourself mechanic. The tools needed are expensive and would not be practical to purchase to use only a few times. Complete rebuilt alternators can be purchased through your local parts distributor for a fraction of the cost of a new unit.

REMOVAL & INSTALLATION





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Fig. Fig. 1 Position of the voltage regulator-10SI-27SI alternators



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Fig. Fig. 2 Component locations inside the alternator casing-CS130 models



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Fig. Fig. 3 Insert a small piece of wire into the brush holder to retain the brushes until the unit is properly installed



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Fig. Fig. 4 Troubleshooting Basic Charging System Problems

  1. Disconnect the negative (-) battery cable.
  2.  
  3. Remove the alternator assembly, as outlined in the Alternator removal and installation procedures in this section.
  4.  
  5. Mark the end frames to ease reassembly.
  6.  
  7. Remove the four thru-bolts and separate the drive end frame assembly from the rectifier end frame.
  8.  
  9. Remove the three attaching nuts and regulator screws.
  10.  

To install:

  1. Insert a small piece of wire in the brush holder as shown in the Regulator illustration. Position the regulator in the rectifier end frame and tighten the attaching screw and nuts.
  2.  
  3. Install the rectifier end frame in the same position as removed and tighten the four thru-bolts. Make sure to remove the brush retaining wire.
  4.  
  5. Install the alternator assembly on the vehicle, as outlined in the Alternator removal and installation procedures in this section.
  6.  

 
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