Chevrolet Workshop Manuals
Express 3/4 Ton Van V8-4.8L VIN V (2003)
Power and Ground Distribution > Auxiliary Power Outlet > Component Information > Diagrams > Diagram Information and Instructions > Page 6464
IMPORTANT: The 100 ms RECORD mode is the length of time an input must stay at a new value in order to record the full change.
5. Simulate the condition that is potentially causing the intermittent connection, either by wiggling the connections or the wiring, test driving, or
performing other operations. Refer to Inducing Intermittent Fault Conditions.
6. Listen for the audible Min Max Alert which indicates that a new minimum or maximum value has been recorded.
If the variation between the recorded MIN and MAX voltage values is 1 volt or greater an intermittent open or high resistance condition exists.
If the variation between the recorded MIN and MAX voltage values is less than 1 volt an intermittent open or high resistance condition does
Testing For Intermittent and Poor Connections
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.
Poor terminal to wire connection-Some conditions which fall under this description are poor crimps, poor solder joints, crimping over the wire
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.
Refer to Testing for Electrical Intermittents for test procedures to detect intermittent open, high resistance, short to ground, and short to voltage
Refer to Scan Tool Snapshot Procedure for advanced intermittent diagnosis.
Testing for Proper Terminal Contact
J 42675 Flat-Wire Probe Adapter
J 38125-C Terminal Repair Kit
It is important to test terminal contact at the component and any in-line connectors before replacing a suspect component. Mating terminals must be
Contamination may be caused by the connector halves being improperly connected. A missing or damaged connector seal, damage to the connector
Deformation is caused by probing the mating side of a connector terminal without the proper adapter, improperly joining the connector halves, or
Round Wire Connectors
Follow the procedure below in order to test terminal contact.
between terminals. This causes high terminal resistance, intermittent contact, or an open circuit. An underhood or underbody connector that shows
3. Using an equivalent male terminal from the J 38125-C , test that the retention force is significantly different between a good terminal and a suspect
terminal. Replace the female terminal in question.
Flat Wire (Dock and Lock) Connectors
source of contamination as well.
3. Visually inspect the terminal bearing surfaces of the flat wire circuits for splits, cracks, or other imperfections that could cause poor terminal
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