99 Dodge Ram Trailer Wiring Diagram

1998 dodge ram 2500 slt, cummins 24 valve, 75,000 miles. And yes i know i can buy a book but i would like to find it on the net and free it doesn't seem like its not out there i just don't know were to dodge ram trailer wiring diagram. Had mechanic look problem went away for 2 weeks we don't have a clue how we corrected the problem the first time.
99 dodge ram trailer wiring diagram 99 dodge ram 2500 trailer wiring diagram