Not Starting on 1995 Lincoln Town Car

I have Lincoln Town Car After I change heater core. Car get
started but next day Car not getting start I have reopen the
dash Bord and check every thing look fine when ever I turn key
passenger side start beeping the beep come in25 time
5 time in one time
please car standing for week let me know what will be

thanks

1 answer
need to re-check all your work and use this site, to get the wiring info

http://repairpal.com/check-engine-light

or take your car to a shop that is good at electrical diagnosis