I have the same problem today, when I took the postive cable off the battery the truck died. I tested the generator for voltage and it was dead. I removed the generator for a closer look. I looked into the back of the generator to inspect the brushes and found a wire going to one of the studs had broken loose. I went ahead and took the generator apart it was very easy. I found the generator had rust on the armature also. I'am going to go ahead and do a alternator conversion and do away with the generator. I figure for waht it will cost to have the generator rebuilt or even buying a rebuilt generator. I will come out spending just as much converting to a 12 volt alternator system.
