GM Bonneville/Eighty Eight/LeSabre 1986-1999

Alternator Precautions

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CAUTION
To prevent damage to the alternator and possible to yourself, the following precautions should be taken when working with the electrical system.

  1. Never reverse the battery connections.
  2.  
  3. Booster batteries for starting must be connected properly: positive-to-positive and negative-to-negative.
  4.  
  5. Disconnect the battery cables before using a fast charger; the charger has a tendency to force current through the diodes in the opposite direction for which they were designed. This burns out the diodes.
  6.  
  7. Never use a fast charger as a booster for starting the vehicle.
  8.  
  9. Never disconnect the voltage regulator while the engine is running.
  10.  
  11. Avoid long soldering times when replacing diodes or transistors. Prolonged heat is damaging to AC (alternating current) generators.
  12.  
  13. Do not use test lamps of more than 12 volts (V) for checking diode continuity.
  14.  
  15. Do not short across or ground any of the terminals of the AC (alternating current) generator.
  16.  
  17. The polarity of the battery, generator, and regulator must be matched and considered before making any electrical connections within the system.
  18.  
  19. Never operate the alternator on an open circuit. Make sure that all connections within the circuit are clean and tight.
  20.  
  21. Disconnect the battery terminals when performing any service on the electrical system. This will eliminate the possibility of accidental reversal of polarity.
  22.  
  23. Disconnect the battery ground cable if arc welding is to be done on any part of the car.
  24.  

BELT TENSION ADJUSTMENT



All alternators used have a rated output of 100-105 amps. If the charging system is inadequate, check the serpentine belt and tensioner.

The drive belt tensioner can control the belt tension over a wide range of belt lengths; however, there are limits to the tensioner's ability to compensate for various belt lengths. Installing the wrong size belt and using the tensioner outside of its operating range can result in poor tension control and damage to the tensioner, drive belt and driven components.

 
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