Circuit Operation

Five fuses supply power for the Rear wheel Anti-Lock (RWAL) Brake System. They are fuses 6 and 16 in the Power Distribution Center (PDC) and fuses 12, 15 and 17 in the fuse block. Fuses 6 and 16 in the PDC are connected directly to battery voltage and are HOT all times. Fuse 6 in the PDC feeds fuse 15 in fuse block. Fuse 12 in the fuse block is HOT when the ignition switch is the ACCESSORY or RUN position. Fuse 17 in the fuse block is HOT when the ignition switch is in the START or RUN position.

In the ACCESSORY or RUN position, the ignition switch connects circuit A1 from 40 amp fuse 16 in the PDC with circuit A31. Circuit A31 connects to a bus bar in the fuse block. The bus bar feeds circuit L5 through fuse 12. Fuse 12 is a 20 amp fuse.

Circuit L5 connects to cavity 3 of the RWAL control module. The L5 input tells the RWAL module when the vehicle is running.

Circuit F32 provides battery voltage to the RWAL module at cavity 9. Circuit F32 is HOT at all times. Fuse 15 in the fuse block protects circuit F32. Circuit A12 from fuse 6 in the PDC feeds the fuse block bus bar that powers fuse 15 and circuit F32.

Circuit Z2 provides ground for the RWAL control module. If the vehicle has intermittent wipers, circuit Z2 also provides ground for the intermittent wiper module.