Schematic Reference: OnStar Schematics

DEFINITION: The OnStar® system remains on after the ignition has been turned off.

Did you perform the Cellular Communication Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Cellular Communication

1. Turn OFF the ignition.
2. Remove the key from the ignition.
3. Open the drivers side door.

Does the OnStar® Green LED stay on?

Go to Step 3

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Repair the ignition 1 voltage circuit for a short to battery voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 4

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2