My charging system decided to go and for the life of me i can't figure out the problem. Before i end up shelling out even more money to fix the issue I've probably made worse and taking it to a professionals, again. I figured i would try here as a last ditch effort. My check gauges light came on and my Ampere Gage tanked, pegged to the bottom 9. The dashboard eventually went crazy by lighting everything up, on and off rapidly. I replaced the battery thinking that could have finally died. that only extended my cars life shortly. Took it to the shop to get it checked out. they replaced the alternator but said that the voltage regulating system has failed and that they couldn't fix it. So, i decided to bypass the PCM and install an external voltage regulator for the alternator. But, alas to no avail. i'm still unable to charge the battery. I've taken a look at the actual wiring to see if it has failed and it all seems decently held together. Anyone have any ideas? BTW, it's a 2002 4L.