Testing For Intermittent and Poor Connections

Most intermittent conditions are caused by faulty electrical connections or wiring. Inspect for the following items:
^ Wiring broken inside the insulation
^ Poor connection between the male and female terminal at a connector-Refer to Testing for Proper Terminal Contact for the specific procedure. Testing For Proper Terminal Contact
^ Poor terminal to wire connection-Some conditions which fall under this description are poor crimps, poor solder joints, crimping over the wire insulation rather than the wire itself and corrosion in the wire to terminal contact area, etc.
^ Wire insulation which is rubbed through- This causes an intermittent short as the bare area touches other wiring or parts of the vehicle.
^ Refer to Inducing Intermittent Fault Conditions in order to duplicate the conditions required in order to verify the complaint. Inducing Intermittent Fault Conditions
^ Refer to Testing for Electrical Intermittent for test procedures to detect intermittent open, high resistance, short to ground, and short to voltage conditions. Diagnostic Aids
^ Refer to Scan Tool Snapshot Procedure for advanced intermittent diagnosis. Scan Tool Snapshot Procedure