replacedthe ecm but will not start on 2004 Isuzu Ascender

with a remote starter switch eng will turn over but will not start with key on .if you try with key all lites in dash go out .new battery

Asked by for the 2004 Isuzu Ascender
try disconnecting the battery for a few minutes. it may reset. be sure to coat both posts with petroleum jelly before reconnecting.