Ram B1500, B2500, B3500, 1999-2003



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.

  1. On air bag-equipped vehicles, disconnect the battery negative cable(s) and wait two minutes from the air bag capacitor to discharge.
  3. Remove the fuse or PDC cover.
  5. Inspect the fuses to determine which is faulty.
  7. Unplug and discard the blown fuse.
  9. Inspect the box terminals and clean if corroded. If any terminals are damaged, replace the terminals.
  11. Plug in a new fuse of the same amperage rating.

NEVER exceed the amperage rating of a blown fuse. If the replacement fuse also blows, check for a problem in the circuit.

  1. Check for proper operation of the affected component or circuit.

Cartridge Fuse

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.

  1. Disconnect the battery negative cable(s).
  3. Remove the PDC cover.
  5. Remove the two screws which secure the cartridge fuse to the B+ terminal stud bus bars.
  7. Remove the fuse.
  9. Installation is the reverse of removal. Tighten the two fuse screws to 30 inch lbs. (3.4 Nm). Proper torque is important.