There should be no difference between starting a bug and a bus. My first thought is to check the ignition switch. In the past, I have pulled the battery out of my vert and used it in the vanagon. will the beetle even turn over? Let me know and I will do some more research. good luck---mark VWTOO@xxxxxxx wrote:Mark, I ended changing the gen. in the bus, but before I did, the gen. light on the beetle came on. So while I'm working on 2 of them I also had 2 not fully charged batteries. I found that a battery that would start the bus would not start the beetle. I checked the starter connections and cleaned them. It is an auto starter on the beetle. Will that draw more? Anything else to check? I appreciate any feedback. Brent