I have a 1997 Isuzu rodeo 3.2L, Last night on the way home from work, I noticed that every time I steped on the gas the voltage gage would drop below 12 volts.The fan would slow down and lights would dim. After 4 or 5 seconds it would recover again.This morning I went to start it up, it ran 3 or 4 seconds,the voltage gage droped hard and it stopped running. now it only turns over and won't start. I will check for blown fuses. What should be looked at first?