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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 103 (Engine Controls Self-Diagnostics - 2.2L) >> Self-Diagnostic System >> Intermittent Conditions >> Electrical Connections or Wiring

Electrical Connections or Wiring

WARNING: This page is about a different car, the 2002 Pontiac Sunfire, 2002 Pontiac Grand Am, 2002 Oldsmobile Alero, and 2002 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
  1. Intermittents are usually caused by one or more of the following conditions:
    • Poor electrical connections.
    • Terminal tension.
    • Wiring problems.
  2. Carefully inspect the suspected circuit for the following conditions:
    • Poor mating of connector halves.
    • Terminals backed out or not fully seated in connector body.
    • Improperly formed or damaged terminals. Test for poor terminal tension.
    • Poor terminal to wire connections including terminals crimped over insulation. This requires removing terminal from connector body.
    • Corrosion or water intrusion. Pierced or damaged insulation can allow moisture to enter the wiring. The conductor can corrode inside the insulation, with little visible evidence. Look for swollen and stiff sections of wire in the suspect circuits.
    • Wires that are broken inside insulation.
    • Pinched, cut, or rubbed-through wiring in the harness.
    • Wiring that is in contact with hot exhaust components.
  3. Repair condition as necessary.