My 93 Dodge 5 speed, I was not charging so I put a a external voltage regulator in. I am charging now. Over the last months though I notice my speedo not working then working, at that same time the tach and AC was not working. Yesterday I was checking my wiring under my hood and I started up my engine and then I was smelling hot plastic and saw my wiring harness smoking. I then shut off my truck. after smelling round I checking I have not bare wires and my PCM is hot and stinks. today it has cooled down. but I now having nothing that the PCM would operate working. I have been checking grounds and wires and cant seem to see any shorts. I think my PCM died. I have ran the external voltage regulator for a couple months and about 2500 miles. I want to get things back working what to do? I am on a tight budget.