Ok, hook the two alternator terminals to the two regulator terminals. Does no matter which goes to which. Now run a 12 volt line from an ignition source to the top regulator terminal along with the alternator wire. Thats it except you need a good ground from the alternator to the regulator case.. 1st Gen Ram Tech - 1st Gen Ram Wire Diagrams - So I think this should be a permanent post.. that involve 1993 Rams and older. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.. 79_Dodge_Truck_Wiring_Diagram.zip (1.49 MB, 1119 views) AutoWiringBeginersGuide.pdf.
Here's a 1993 diesel alternator wiring diagram. WARNING. I see a mistake in this diagram, the very bottom wire on the alternator picture is labelled LG/R. If you follow this wire up, it is labelled Y/W. Yellow white is the proper color for this wire. The other wire going to the dash light is labelled LG/R. That is the proper color for that wire.. Appreciate it lots helped me through a nightmare . My truck's wiring had been fixed a couple times before somebody installed a trailer brake and spliced it into extra outlets, an alien push button, fuse box, the light behind the Cummins logo on the dash, and back to a terminal post on my driver's side fender, with the outlets and trailer brakes ground wires were spliced into my AC, heat, and.