Isuzu Ascender 2003-05

Alternator

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Diagnosis & Testing



Ensure the battery is fully charged. Check battery terminals making sure they are clean and tight. Listen for any abnormal noises coming from alternator. Inspect drive belt for proper tension. Check charging system for proper voltage output. Ensure fuses and fusible links are not blown. Install scan tool for additional testing.

Installation



4.2L Engine
  1. Install or connect the following:

    Alternator and loosely install the mounting blots
     
    Tighten the alternator mounting bolts to 37 ft. lbs. (50 Nm)
     
    Positive battery cable and secure with the nut; tighten the nut to 80 inch lbs. (9 Nm)
     
    Engine lift hook and bolts; tighten the bolts to 37 ft. lbs. (50 Nm)
     
    A/C line bracket to the lift hook, then tighten the retaining bolt to 89 inch lbs. (10 Nm)
     
    Accessory belt
     
    Negative battery cable
     

  2.  

  1. Install or connect the following:

    Alternator and loosely install the mounting blots
     
    Tighten the alternator mounting bolts to 37 ft. lbs. (50 Nm).
     
    Positive battery cable and secure with the nut; tighten the nut to 80 inch lbs. (9 Nm).
     
    Engine lift hook and bolts; tighten the bolts to 37 ft. lbs. (50 Nm)
     
    A/C line bracket to the lift hook, then tighten the retaining bolt to 89 inch lbs. (10 Nm).
     
    Accessory belt
     
    Negative battery cable
     

  2.  

5.3L Engine
  1. Install or connect the following:

    Alternator and loosely install the mounting bolts
     
    Tighten the bolts to 37 ft. lbs. (50 Nm)
     
    Alternator cable
     
    Terminal stud nut and tighten to 80 inch lbs. (9 Nm)
     
    Boot back over terminal stud
     
    Electrical connector
     
    Accessory belt
     
    Negative battery cable
     

  2.  

  1. Install or connect the following:

    Alternator and loosely install the mounting bolts
     
    Tighten the bolts to 37 ft. lbs. (50 Nm).
     
    Alternator cable
     
    Terminal stud nut and tighten to 80 inch lbs. (9 Nm).
     
    Boot back over terminal stud
     
    Electrical connector
     
    Accessory belt
     
    Negative battery cable
     

  2.  

Removal



4.2L Engine
  1. Before servicing the vehicle, refer to the precautions section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Accessory belt
     
    Positive battery cable nut from the generator
     
    A/C line mounting bracket bolt at the engine lift hook
     
    Right engine lift hook bolts
     
    Engine lift hook
     
    Mounting bolts
     
    Alternator
     

  4.  

5.3L Engine
  1. Before servicing the vehicle, refer to the precautions section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Accessory belt
     
    Electrical connector
     
    Terminal stud nut, after sliding boot down
     
    Alternator cable
     
    Mounting bolts
     
    Alternator
     

  4.  

Removal & Installation



4.2L Engines
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Accessory belt
     
    Positive battery cable nut from the generator
     
    A/C line mounting bracket bolt at the engine lift hook
     
    Right engine lift hook bolts
     
    Engine lift hook
     
    Mounting bolts
     
    Alternator
     

  4.  

5.3L Engine
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Accessory belt
     
    Electrical connector
     
    Terminal stud nut, after sliding boot down
     
    Alternator cable
     
    Mounting bolts
     
    Alternator
     

  4.  

 
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