i bought a sortster 883 with a 1200 kit and installed a 1200 ecm flash. my engine and battery light came on. dealer diagnostic said there were no codes. installed new battery and lights persisted. after 1 day battery is dead and when i jumpstart it the rpms go crazy and i need to shut down. please help

 

Double post?

 

yes sorry

 

i wiggled the negative battery cable and it has so far gone away. cable was tight and clean