impala wont start.tried resets-fail.thinking bad BCM. on 2001 Chevrolet Impala

i learned that the ign.cyl. was changed but prblem has returned. first guy may have try bypassn some components but my research shows not to bypass anything except for maybe passlock. found wires cut off,at this point car is not starting but it has given me abnormal blinking lites,ipc gones off, no crank the one point it started, chk.eng./abs lites went off but came back on.ideas?

Asked by for the 2001 Chevrolet Impala