I did what you said. Started the engine and pulled the negative battery wire off and the engine stopped. The generator is newly rebuilt. I bought it off of ebay. I might have damaged the generator by putting oil; down the oil caps, front and rear, not knowing that sealed bearing were used. Is it possible that I can take the generator apart and clean my mess and still have a working unit?
This sums it up, the generator isn't putting out any current. You should take the generator apart, and wash down the armature with non chlorinated brake cleaner, and blow it dry. Check to see if you got any oil on the fields also by putting your hand inside the case. If you did, then do the same by spraying the brake cleaner inside of the steel case to wash away any oil. Purchase new brushes, install them, and complete the reassembly of the generator. If you have a local Autozone, O'Reilly's, Advanced Autor, or similar store nearby, take the generator into the store, and ask them to put it on their machine to check to see if there is any output. If there is no output, that means that the armature in all likely hood is defective. It is extremely rare to have the fields go bad, unless there is a broken wire. If you don't feel competent to do the repair, see if there is a local shop that repairs starters, alternators, and generators, and ask them to fix it for you. They will have the expertise to get it working again. Before you leave it, get some sort of estimate of costs. If you still have your original generator, take that with you for parts, should some major component be defective. Also, don't leave it behind when you pick up the repaired unit. You never know when you might need another part off of the old generator. Even keep the defective parts, with the exception of the brushes. Armatures can be rewound to work again. Generators are rapidly disappearing from the landscape of old cars, and there may be a time that you can't find even the simplest of parts.