1999 frontier alarm

I bought my truck used and it's got keyless entry but I didn't get a remote with it. Today I was doing some routine maintenance on it and the alarm starts going off and headlights flashing. I tried everything to turn it off finally I unhooked the battery. As soon as I hook it back up it starts going off again. Is there anyway to reset this without a remote? Thanks

Often turning your key in the door to unlock, or in the ignition to turn the vehicle on will exit the panic mode. The remote you need is FCC: KOBUTA3T and Nissan remotes are quite easy to program.