Fuse Block: Description and Operation
FUSEBLOCK MODULEFuseblock Module Location:
An electrical fuseblock module is concealed behind the driver side instrument panel end cap, just rearward of the relay and fuse block. The fuseblock module serves to distribute electrical current to many of the accessory systems in the vehicle. The fuseblock module houses up to twenty blade-type mini fuses, up to two blade-type automatic resetting circuit breakers and an International Standards Organization (ISO) relay. Additional provisions are available in the fuseblock module for a second ISO relay and an ignition lamp time delay relay; however, these provisions are not used in this vehicle application.
The molded plastic fuseblock module housing has an integral mounting bracket that is secured with two screws to the left instrument panel end bracket. The driver side instrument panel end cap also serves as a snap-fit fuse access panel that can be removed for service of the fuseblock module and the relay and fuse block. A finger recess is molded into the end cap for easy removal. A fuse layout map is molded onto the back side of the end cap to ensure proper fuse identification.
The fuseblock module is integral to the instrument panel wire harness. If any internal circuit or the fuseblock module housing is faulty or damaged, the entire fuseblock module and instrument panel wire harness unit must be replaced.
All of the circuits entering and leaving the fuse- block module do so through the instrument panel wire harness. Internal connection of all of the fuse- block module circuits is accomplished by an intricate combination of hard wiring and bus bars.
RELAY AND FUSE BLOCK
Relay And Fuse Block Location:
An electrical relay and fuse block is concealed behind the driver side instrument panel end cap, just forward of the fuseblock module. The relay and fuse block provides additional capacity for distribution and control of electrical current for the accessory systems of this vehicle, which could not be accommodated by the fuseblock module or the Power Distribution Center (PDC). The relay and fuse block has cavities for up to four additional blade-type mini fuses, the electronic combination flasher, and three additional International Standards Organization relays (one standard-type and two micro-type).
The relay and fuse block is snap fit onto mounting tabs located on the back of the left instrument panel end bracket, behind the left outboard end of the instrument panel. The driver side instrument panel end cap also serves as a snap-fit fuse access panel that can be removed for service of the relay and fuse block and the fuseblock module. A finger recess is molded into the end cap for easy removal. A fuse layout map is molded onto the back side of the end cap to ensure proper fuse identification.
The relay and fuse block unit cannot be repaired and is only serviced as a unit with the instrument panel wire harness assembly. If the relay and fuse block housing or its internal circuits are faulty or damaged, the entire relay and fuse block and instrument panel wire harness unit must be replaced.
The relay and fuse block is integral to the instrument panel wire harness, and all circuits entering or leaving this module do so through the instrument panel wire harness. Internal connection of all of the relay and fuse block circuits is accomplished by hard wiring.