Power Distribution Module: Description and Operation

POWER DISTRIBUTION CENTER
Most of the electrical current distributed throughout this vehicle is directed through the standard equipment Power Distribution Center (PDC). The remainder of the current is directed through the rear fuse/relay block. The molded plastic PDC housing is located in the left rear corner of the engine compartment. The PDC housing has a molded plastic cover that includes an integral hinge feature, and an integral latch. The PDC cover is easily removed for service access and has a convenient fuse and relay layout label affixed to the inside surface of the cover to ensure proper component identification.

The PDC housing is secured in the engine compartment with four screws. A small molded plastic protective cover on the front end of the PDC is unsnapped to access the battery/generator cable input connection studs. All of the PDC outputs are through the integral engine compartment wire harness.

All of the current from the battery/generator cable connection enters the PDC through a 140 ampere fusible link that is secured Just inside the front end of the PDC housing. The PDC houses up to nine maxi-fuse cartridges, which replace all in-line fusible links. The PDC also houses up to ten blade-type fuses, up to four full International Standards Organization (ISO) relays, and up to eight ISO micro-relays. Internal connection of all the PDC circuits is accomplished by an intricate network of hard wiring and bus bars. For complete circuit diagrams, refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, further details on wire harness routing and retention, as well as pin-out and location views for the various wire harness connectors, splices and grounds.

The fuse cartridges, fuses, circuit breakers, and relays are available for service replacement. The PDC unit cannot be repaired and is only serviced as a unit with the engine compartment wire harness. If the PDC is faulty or damaged, the engine compartment wire harness assembly must be replaced.