Intermittent Conditions: Harness/Connector

WARNING: This page is about a different car, the 2003 Pontiac Grand Am, 2003 Oldsmobile Alero, 2003 Chevrolet Monte Carlo, and 2003 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.

Many intermittent open or shorted circuits come and go with harness/connector movement caused by vibration, engine torque, bumps/rough pavement, etc. Check for this type of condition by performing the applicable procedure from the following list:

Move related connectors and wiring while monitoring the appropriate scan tool data.
Move related connectors and wiring with the component commanded ON, and OFF, with the scan tool. Observe the component operation.
With the engine running, move related connectors and wiring while monitoring engine operation.

If harness or connector movement affects the data displayed, component/system operation, or engine operation, inspect and repair the harness/connections as necessary. Go to ELECTRICAL CONNECTIONS OR WIRING .