I have a 2005 883 sportster. have a battery less
Check you have connected battery leads properly, failing that, check you have not blown a fuse,
Just as a further tip, if you intend to leave your bike for a while why not get a trickle charger, you can opt for a special designed one ie Oxford Optimiser, or Cheaper if you live in the U.k. you can get a Solar One frok Maplin, reduced to £9.99 they are great, Hope This helps