Driving back from a camping trip, my "CHECK emission systems" light came on, my speedometer stop functioning, and my head and tail lights started flickering. I stopped and changed my alternator fuse and the secong one didn't even last 1 second. Is it my alternator spiking? Should I just change the alternator myself instead of bringing into a garage or should I get it checked out? Has this ever happen to anybody? Is this a common problem?

I use an eliminator in my ACC outlet (transforms it into an ordinary household plug) this weekend, could that have been the source of the problem?

Thanks