after market keyless-entry/alarm for 96 CIVIC LX

an after market keyless-entry/alarm was installed in my 96 civic way back in 96. the alarm manufacturer does not support it anymore so i'm stucked with an erratic alarm. i had it disabled a long time ago. My question/problem is how to permanently disable (i just turned the switch off) or better yet to uninstall the said alarm module. i have an idea where the module is installed (a harrison brand) - front passenger- side, just below the dashboard. help me please.

thanks