Initial Inspection and Diagnostic Overview

Circuit F12 originates in the fuse block where it connects to a bus bar fed by circuit A21. In the START and 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 F12 splices to feed the ABS control module, EGR solenoid, Torque Converter Clutch (TCC) solenoid, leak detection pump, and the EVAP/Purge
solenoid.

Circuit F12 also connects to a bus bar in the PDC. The bus bar supplies voltage to the coil side of radiator fan relay and A/C clutch relay, as well as the fuel pump relay.