Battery cables are always a good beginning point. They need to be clean and tight. The large ground cable to the block can cause that problem also. That also needs to be in good shape.
Usually I don't test them. If the ends look old and junky looking, I replace them. Buy mine over the counter at the parts store.Originally posted by 70chevychevelle:
hey john i was wondering if they is any way to test the big ground cable to the block. cause mine wont start all the time either