Description

POWER DISTRIBUTION





This section describes the power distribution components used on this model as well as the methods in which battery voltage and charging system voltage is distributed throughout the vehicle. All vehicles are equipped with a starter battery located in a floor well forward of the driver front seat and some vehicles may be equipped with an optional auxiliary battery located in the left engine compartment. The actual configuration of the power distribution components depends on the vehicle specific equipment, option level and add on accessories.

The power distribution system for this vehicle consists of the following major components:

- Fuse/Relay Block #1 (1)
- Power Distribution Center (PDC) (2)
- Fuse/Relay Block #2 (3)

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

- 300 amp melting fuse in the positive battery cable
- Micro Relays
- Cube Relays
- Automatic Resetting Circuit Breakers
- Maxi Fuses
- Standard Blade Type Fuses
- Bolt-On MIDI Fuses

POWER DISTRIBUTION CENTER (PDC)






The Power Distribution center (PDC) is attached to a stud (8) on the positive battery clamp of the starter battery. The PDC contains six bolt-on MIDI fuses which protect components such as glow plugs, double auxiliary cooling fans and provide additional protection to the feed circuits that power the fuse/relay boxes. The PDC contains MIDI fuses for the following systems:

- Glow output stage/secondary air pump (1)
- Air conditioner additional fan (2)
- Fuse/Relay Block #1 power feed (3)
- Auxiliary battery (4)
- Instrument panel (5)
- Seat box components power feed bridged jumper (6)
- Electrical heater booster (7)

FUSE/RELAY BLOCK #1






The Fuse/Relay Block #1 (also known as the SRB) (1) is located beneath the driver side end of the instrument panel in the passenger compartment. The SRB is the location for all standard fuses and relays and acts as the junction block for several of the vehicles wiring harnesses. Fuse Block #1 (3) and Fuse Block #2 (2) are both attached to the bottom of the SRB by a bracket. The Body Control Module (BCM) (also known as the Signal Acquisition and Actuation Module/SAM), is directly plugged into the right side of the SRB.

FUSE/RELAY BLOCK #2






The Fuse/Relay Block #2 located on the left side of the driver seat consists of the following individual components:

- Relay Block (3)
- Fuse Block #3 (7)
- Fuse Block #4 (4)
- Fuse Block #5 (6)
- Fuse Block #6 (5)

Other power distribution components located under the driver seat are the Cube Relays (1) and the High Current Fuses (2) used for add on accessories.

MODULES UNDER DRIVER SEAT





In addition to the Fuse/Relay Block #2 there are a number of components that can be accessed under the driver front seat. Depending on the vehicle option/accessory content those components are:
- Transmission Control Module (1)
- Rear Park Assist Buzzer (2)
- Park Assist Module (3)
- Trailer Module (4)
- Battery Isolator Relay (5)
- Auxiliary Flasher Module (6)
- Traction Control Module (7)
- Programmable Special Module (8)
- Tire Pressure Monitor Module (9)
- Dynamics Sensor (10)
- Remote Keyless Entry Module (11)