Initial Inspection and Diagnostic Overview

Circuit F12 splices to feed the ABS control module, PCM, Duty Cycle EVAP/Purge solenoid, leak detection pump, and the TCC solenoid. The F12 circuit also connects to a bus bar in the Power Distribution Center (PDC) that supplies voltage to the coil side of radiator fan relays, A/C clutch relay, and fuel pump relay.

In the START or RUN position, the ignition switch connects circuit A1 from the fuse block and circuit A21. Circuit A1 connects to battery voltage and is protected by a 30 Amp fuse in the PDC.