For complete circuit diagrams, refer to the appropriate wiring information. The wiring information includes wir-
ing diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector
pin-out information and location views for the various wire harness connectors, splices and grounds.

OPERATION

The power distribution system for this vehicle is designed to provide safe, reliable, and centralized distribution points
for the electrical current required to operate all of the many standard and optional factory-installed electrical and
electronic powertrain, chassis, safety, security, comfort and convenience systems. At the same time, the power dis-
tribution system was designed to provide ready access to these electrical distribution points for the technician to use
when conducting diagnosis and repair of inoperative circuits. The power distribution system can also prove useful
for the sourcing of additional electrical circuits that may be required to provide the electrical current needed to oper-
ate many accessories that the vehicle owner may choose to have installed.

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SPECIAL TOOLS

POWER DISTRIBUTION SYSTEMS

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MODULE-INTEGRATED POWER

DESCRIPTION

The Integrated Power Module (IPM) is a combination
of the Power Distribution Center (PDC) (1) and the
Front Control Module (FCM) (2). The PDC mates
directly with the FCM to form the IPM. The PDC is a
printed circuit board based module that contains fuses
and relays, while the FCM contains the electronics
controlling the IPM and other functions. The IPM is
located in the engine compartment, next to the battery
and connects directly to the battery positive via a stud
located on top of the unit. The ground connection is
via electrical connectors. The IPM provides the pri-
mary means of voltage distribution and protection for
the entire vehicle.

The molded plastic IPM housing includes a base and
cover. The IPM cover is easily opened or removed for
service access by unscrewing the cover retaining nut
and has a fuse and relay layout map integral to the
inside surface of the cover. This IPM housing base
and cover are secured in place via bolts to the left
front fender support assembly.

Replaceable components of the IPM assembly are broken down into the following components:

•

The Power Distribution Center (PDC)

•

The IPM cover

•

The Front Control Module (FCM)

•

Complete IPM assembly that includes all three parts

OPERATION

All of the current from the battery and the generator output enters the integrated power module via a stud on the top
of the module. The integrated power module cover is removed to access the fuses or relays. Internal connections of
all of the power distribution center circuits is accomplished by a combination of bus bars and a printed circuit board.

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