09-08-45-003E Installation of Electrical Aftermarket Accessories on 2-Mode Hybrid Full Size Trucks - (Jun 21 2012) - part 5
Chassis ground can also be accessed at both the front compartment and rear cargo areafuse blocks.Accessing Power and Ground from the Power Distribution System
Danger:The wire harnesses and cables for the hybrid high voltage circuits are encased inan orange colored covering. In addition, high voltage components such as the EnergyStorage System and high voltage cables are affixed with “High Voltage” red danger,and orange warning labels. The intermediate 42 volt system is encased in a blue coloredcovering, and has yellow caution labels on the components, wire harnesses,and cables. Do not remove, open, take apart, or modify these devices. Do not probe,tamper with, cut, or modify high voltage, or intermediate voltage cable or wiring.
The front compartment fuse block is located in the front floor console. To access,remove the front floor console bezel. Refer to Floor Console Bezel Replacement inSI.
The rear cargo area fuse block is located under the left rear quarter trim panel.To access, remove the left rear cup holders.
Front and Rear Fuse Block Connection
The procedure to connect to the power and ground to either the front compartment orrear cargo area fuse block is the same. Follow the procedure below.Disconnect the 12 volt battery feed coming directly from the battery to the underhoodfuse block. This will remove power from the front compartment fuse block and rearcargo area fuse block, allowing a safe connection.Access the fuse block by removing any tie raps retaining the fuse block. Pull thefuse block out so that it can easily be accessed.
Remove the cover.
Remove the fuse block base by using a small screwdriver to release the four locks(1).
Contained within the fuse block are three bus bars. Ground (1). Ignition (2). Battery(3).
Note:Wire colors shown are not representative of production.
Remove the blue terminal retainer (comb) from the fuse block.Up to 3 circuits can be connected up to each bus bar. This comprises of 3 grounds,3 battery feeds, and 3 ignition feeds.
The Power Distribution System includes 9 loose terminals provided in a plastic bag.These terminals will be used to connect the electrical accessory(s) to the fuse block.
Note:The following steps can be used to connect to either the ground, battery or ignitionfeed bus bars.
Using the proper crimping tool, crimp the terminal to the accessory wire.
Insert the terminal into the first available cavity of the bus bar you are connectingto. Ensure the terminal lock engages in the fuse block cavity.
On the front side of the fuse block, insert a suitable mini fuse to bridge the busbar to the terminal inserted.
Important:The total power available to the panel(s) is 45 amps (540 watts).
Note:A fuse must also be inserted into the fuse block when connecting to the ground busbar. This fuse will be redundant to the power side fuse and only provides a connectionfrom the ground bus bar to the terminal.