Ignition Switch: Description and Operation

CIRCUIT OPERATION
When the ignition switch is in the START/RUN position, it connects circuit A1 from the Power Distribution Center (PDC) to circuit A21 through the ignition switch. A 20 Amp fuse in cavity 8 of the PDC protects circuits A1 and A21. Circuit A1 is spliced and provides power to the fuel pump relay, Powertrain Control Module (PCM), and the engine starter motor relay.

The A21 circuit connects from the ignition switch to the junction block on circuit F12. The F12 circuit is protected by a 10 Amp fuse located in cavity 10. Circuit F12 is spliced and connects to the Powertrain Control Module (PCM), fuel pump relay, and the ABS Control Module, and distributor.