Title pretty much sums it up. Friend of mine has a v10 in a 3/4 ton pickup. He replaced the alternator and it started overcharging. Shut it off and now he has lost all gauges, fuel pump, dome light and cigarette lighter. All the fuses are testing good and the OBD2 will not link to the matco scan tool we have access too. Any ideas??????? Computer maybe???? It was just replaced by the dealer for almost a thousand bucks so he is hoping that is not the problem. Can a person get another one from a salvage yard and try that?