Diagnostic Aids

WARNING: This page is about a different car, the 2002 Buick Regal and 2002 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS .
The table below shows the ignition switch positions and the corresponding states of the circuits.

Fig 1: Identifying Ignition Switch Positions Table
Courtesy of GENERAL MOTORS CORP.