Ignition Switch: Description and Operation

OPERATION
In the RUN position, the ignition switch connects power from the Power Distribution Center (PDC) to a 30 amp fuse in the fuse block, back to a bus bar in the PDC. The bus bar feeds circuits for the Power- train Control Module (PCM), duty cycle purge solenoid, EGR solenoid, and ABS system. The bus bar in the PDC feeds the coil side of the radiator fan relay, A/C compressor clutch relay, and the fuel pump relay It also feeds the Airbag Control Module (ACM).

CIRCUIT OPERATION
In the RUN position, the ignition switch connects circuit A1 from the Power Distribution Center (PDC) to circuit A21. A 30 Amp fuse in the PDC protects circuits A1 and A21. Circuit A21 feeds a bus bar in the fuse block. The bus bar feeds circuits G5, F12, and F15.
- Circuit G5 powers the gauge cluster warning lamps and the daytime running lamp (DRL) module. Fuse cavity 11 (5 Amp) in the fuse block protects circuit G5.
- Circuit F12 splices to the Powertrain Control Module (PCM), duty cycle purge solenoid, EGR solenoid, ABS system, and a bus bar in the PDC. The bus bar in the PDC feeds the coil side of the radiator fan relay, A/C compressor clutch relay, and the fuel pump relay A 15 Amp fuse in the fuse block, cavity 10, protects circuit F12.
- Circuit F15 feeds the Airbag Control Module (ACM). A 10 Amp fuse in the fuse block, cavity 9, protects circuit F15.