GM Firebird 1982-1992 Repair Guide

Voltage Regulator

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REMOVAL & INSTALLATION



See Figures 1 and 2



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Fig. Fig. 1: Voltage regulator with brushes depressed



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Fig. Fig. 2: Alternator end frame

This procedure is to be performed with the alternator removed from the vehicle. The new style CS alternators on 1987-92 vehicles are non-serviceable and must be replaced as an assembly.

  1. Make scribe marks on the end frames to make reassembly easier.
  2.  
  3. Remove the 4 through-bolts and separate the drive end frame assembly from the rectifier end frame assembly.
  4.  
  5. Remove the 3 diode trio attaching nuts and the 3 regulator attaching screws.
  6.  
  7. Remove the diode trio and the regulator from the end frame.
  8.  

To install:
  1. Push the brushes into the brush holder and install a brush retainer or a tooth pick to hold the brushes in place.
  2.  
  3. Install the regulator into the alternator.
  4.  
  5. Install the diode trio.
  6.  
  7. Install the halves of the alternator and secure the halves with the 4 through-bolts. After the alternator is assembled, remove the brush retainer.
  8.  

 
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