The vehicle's electrical components are protected with a large number of fuses connected at critical junctions of the wiring system.
"Maxi fuses", located in the Power Distribution Center (PDC), have high amperage ratings and replace the "fusible links" of previous years.
"Mini fuses", with lower amperage ratings, are located in the PDC and on the junction block (or fuse panel) located on the left side of the dash panel.
Both the PDC and the junction block provide location for relays as well.
The electrical junction block is concealed behind the left end of the instrument panel cover. This block serves to simplify and centralize numerous electrical components and to distribute electrical current to many of the accessory systems in the vehicle. It also eliminates the need for numerous splice connections and serves in place of a bulkhead connector between many of the engine compartment, instrument panel, and chassis wire harnesses.
The junction block houses up to nineteen blade-type fuses (two standard and seventeen mini), up to two blade-type automatic resetting circuit breakers, and two ISO relays (one standard, one micro).
- A fuse puller and spare fuse holders are located on the back of the fuse access cover.
POWER DISTRIBUTION CENTER
Located in the engine compartment, the PDC houses the alternator cartridge fuse, up to ten maxi fuses, up to seven blade-type mini fuses, and as many as 13 ISO relays (standard and micro).
- The inside of the PDC cover has a map identifying each element.
If a mini fuse blows, a single component or single circuit will not function properly.
If a maxi-fuse blows, an entire circuit or several circuits will not function properly.
Excessive current draw is what causes a fuse to blow. Observing the condition of the fuse will provide insight as to what caused this to occur.
A fuse with signs of burns, melting of the plastic shell, or little to no trace of the wire that once served as the conductor indicates that a direct short to ground exists.
- On air bag-equipped vehicles, disconnect the battery negative cable(s) and wait two minutes from the air bag capacitor to discharge.
- Remove the fuse or PDC cover.
- Inspect the fuses to determine which is faulty.
- Unplug and discard the blown fuse.
- Inspect the box terminals and clean if corroded. If any terminals are damaged, replace the terminals.
- Plug in a new fuse of the same amperage rating.
- Check for proper operation of the affected component or circuit.