Power Distribution: Overview Jeep Commander I

This article covers the various standard and optional power distribution components used on this model. The power distribution system for this vehicle consists of the following components

1. Front Control Module (FCM)
2. Integrated Power Module (IPM)
3. Power Distribution Center (PDC)
4. Junction Block (JB)
5. Power Outlets

The power distribution system also incorporates various types of circuit control and protection features, including

1. Automatic resetting circuit breakers
2. Blade-type fuses
3. Bus bars
4. Cartridge fuses
5. Circuit splice blocks
6. Flashers
7. Fusible links
8. Standard and Micro-Relays

Following are general descriptions of the major components in the power distribution system. See the owner's manual for more information on the features and use of all of the power distribution system components. Refer to SYSTEM WIRING DIAGRAMS article for complete circuit diagrams.

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 standard and optional factory-installed electrical and electronic powertrain, chassis, safety, security, comfort and convenience systems. At the same time, the power distribution system was designed to provide ready access to these electrical distribution points for the vehicle technician to use when conducting diagnosis and repair of faulty 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 operate accessories that the vehicle owner may choose to have installed in the aftermarket.

Scheme 1

Scheme 2

The Integrated Power Module (IPM) (2) is a combination of a printed circuit board based module that contains fuses and relays and the Front Control Module (FCM) (3). The FCM contains electronics that control the IPM as well as other vehicle functions. The IPM 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 primary means of voltage distribution and protection for many vehicle systems.

The IPM (2) is located in the engine compartment, next to the battery (5) and in front of the Power Distribution Center (PDC) (1). It is secured to a bracket with three locating slots that snap onto the bracket tabs holding it securely in place. The printed circuit board portion of the IPM cannot be repaired and must be replaced if inoperative or damaged. See REMOVAL .