I have a 1998 2500 dodge with 5.7 diesel.. my truck has a check engine light that comes and goes so I carried it to the local dealer and had it checked and the guys there told it was a RF interference probelm and they updated the controller with Part #56046355AE (I have no clue what this is) and that worked for a while. now the light is back on and the guys at the shop says that i need to insulate a wire inside TSP by removing it from the wiring harness and wrapping this wire with a small guage copper wire from end to end and then attach both ends of this wrapped wire to the - (NEG) posts of my batteries.. Has any one had this probelm before??? if so, does this fix that these guys offered work?? can anyone tell me which wire should be wrapped?? THANKS for any help that can be offered.