GM Service Manual Online
For 1990-2009 cars only

The Circuit Testing section contains the following diagnostic testing information. Using this information along with the diagnostic procedures will identify the cause of the electrical malfunction.

    â€¢  Using Connector Test Adapters
    â€¢  Probing Electrical Connectors
    â€¢  Troubleshooting with a Digital Multimeter
    â€¢  Troubleshooting with a Test Lamp
    â€¢  Using Fused Jumper Wires
    â€¢  Measuring Voltage
    â€¢  Measuring Voltage Drop
    â€¢  Measuring Frequency
    â€¢  Testing for Continuity
    â€¢  Testing for Short to Ground
    â€¢  Testing for a Short to Voltage
    â€¢  Testing for Intermittent Conditions and Poor Connections
    â€¢  Inducing Intermittent Fault Conditions
    â€¢  Testing for Electrical Intermittents
    â€¢  Scan Tool Snapshot Procedure
    â€¢  Circuit Protection - Fuses
    â€¢  Circuit Protection - Circuit Breakers
    â€¢  Circuit Protection - Fusible Links