GM Grand Am/Achieva/Calais/Skylark/Somerset 1985-98

Ignition Coil

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TESTING



  1. Turn the ignition key OFF .
  2.  
  3. Unplug the coil pack from the vehicle harness connector.
  4.  
  5. Measure the resistance between terminals with a Digital Volt Ohmmeter (DVOM).
  6.  
  7. If the reading is not greater than 10 kilohms, replace the coil.
  8.  
  9. Reinstall all components and reattach the negative battery cable.
  10.  

REMOVAL & INSTALLATION



See Figure 1

  1. Disconnect the negative battery cable.
  2.  
  3. Detach the 11-pin IDI/ICM harness connector.
  4.  
  5. Remove the ignition coil and module assembly from the engine, as outlined in this section.
  6.  
  7. Unfasten the housing to cover retaining screws, then remove the housing from the cover.
  8.  
  9. Disengage the coil harness connector(s).
  10.  
  11. Remove the coil(s), contact(s) and seal(s) from the cover.
  12.  



Click image to see an enlarged view

Fig. Fig. 1: Exploded view of the ignition coil(s) and related components-1995-98 shown

To install:
  1. Install the coil(s) to the cover.
  2.  
  3. Attach the coil harness connector.
  4.  
  5. Install new seals to the housing.
  6.  
  7. Using petroleum jelly to retain the contacts, install the contacts to the housing.
  8.  
  9. Install the housing cover and secure using the retaining screws. Tighten the screws to 35 inch lbs. (4 Nm).
  10.  
  11. Fit the spark plug boots and retainers to the housing.
  12.  
  13. Install the IDI assembly to the engine, as outlined in this section.
  14.  
  15. Attach the 11-pin harness connector.
  16.  
  17. Connect the negative battery cable.
  18.  

 
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