I bought this bike recently and it had no power after installing a new battery, found out they had the cables to the battery wired backwards. So switched then and had power, and bike started. I made it to the end of the block when it died and now now headlight nothing. When I take my tester I have power from the battery to the silniod, and to the assembly circuit breaker (main). When I turn the switch on with the key, I lose everything. I checked all fuses in the fuse box all where good. Any ideas if it's a ground issue or what.