rebuiltmy 4.0 engine now its like it won't read my ignition key on 2001 Jeep Grand Cherokee

my battery was unhooked for about 3 runs for about 2secs.the guages don't work and the key indicator stays lit in the dash.i think it has something to do with the alarm system' but don't know what to do about it

you have to get the system reprogrammed to sync. up with the new component.