I have a wolf islander scooter and I bought it without working electric. Everything else works perfect except the electric. When I hook up a battery and use a multimeter, most places will read 12 or 13 volts like the headlight. When I put a bulb in, there is no light. This is the same for the other components as well. I am thinking it might be an unconnected ground but I am not very good with it so I am unsure how to diagnose that.