RAM 2500 Truck 2WD L6-5.9L DSL Turbo VIN C (2002)
Alternator: Description and Operation
GENERATOR
The generator is belt-driven by the engine using a serpentine type drive belt. It is serviced only as a complete assembly. If the generator fails for any
reason, the entire assembly must be replaced.
As the energized rotor begins to rotate within the generator, the spinning magnetic field induces a current into the windings of the stator coil. Once the
generator begins producing sufficient current, it also provides the current needed to energize the rotor.
The Y type stator winding connections deliver the induced alternating current to 3 positive and 3 negative diodes for rectification. From the diodes,
rectified direct current is delivered to the vehicle electrical system through the generator battery terminal.
Although the generators appear the same externally, different generators with different output ratings are used on this vehicle. Be certain that the
replacement generator has the same output rating and part number as the original unit. Refer to Generator Ratings in the Specifications section at the
back of this group for amperage ratings and part numbers.
Noise emitting from the generator may be caused by: worn, loose or defective bearings; a loose or defective drive pulley; incorrect, worn, damaged or
misadjusted fan drive belt; loose mounting bolts; a misaligned drive pulley or a defective stator or diode.
GENERATOR CARTRIDGE FUSE
A 140 ampere generator cartridge fuse is used on this model. The generator cartridge fuse is similar to other cartridge fuses found in the Power
Distribution Center (PDC). This fuse has a color-coded plastic housing and a clear plastic fuse conductor inspection cover like other cartridge fuses, but
has a higher current rating and is connected and secured with screws instead of being pushed onto male spade-type terminals. The generator cartridge
fuse cannot be repaired and, if faulty or damaged, it must be replaced.
The generator cartridge fuse is secured between the two B(+) terminal stud connection bus bars within the Power Distribution Center (PDC). This fuse
protects the vehicle electrical system from damage that could be caused by excessive charging system output and/or excessive electrical system current
levels resulting from a faulty generator or faulty charging system control circuits. If the current rating of the fuse is exceeded, the fuse conductor melts to
open the generator output circuit connection to the PDC. If a generator cartridge fuse fails, be certain to completely inspect and test the vehicle charging
system before replacing the fuse and returning the vehicle to service. Refer to Charging System for the charging system diagnostic procedures. Refer to
Wiring Diagrams for the location of complete PDC circuit diagrams.
