Removal & Installation
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.
The truck is equipped with a cartridge fuse in the Power Distribution Center (PDC) to protect the electrical system from excessive output from the alternator resulting from a defective alternator or regulator circuits. This fuse is rated at 120 amps on 97 RAM trucks and 140 amps on the other models.
This fuse has a color-coded plastic housing and a clear plastic fuse conductor inspection cover. It is secured with screws across the two B+ terminal stud connection bus bars.
If this fuse fails, a thorough inspection of the charging system must be carried out before replacement.
- Disconnect the battery negative cable(s).
- Remove the PDC cover.
- Remove the two screws which secure the cartridge fuse to the B+ terminal stud bus bars.
- Remove the fuse.
- Installation is the reverse of removal. Tighten the two fuse screws to 30 inch lbs. (3.4 Nm). Proper torque is important.