Remote start?

I have installed 3 hornet remote starters , none of the cars have alarms. I have downloaded wiring diagrams for all the cars and they show the horn wire , is there a way to sound off the horn when locking or unlocking the doors? If so where do I run the wire to?

Easy, grab a relay:

#1: cut the parking light wire on the alarm

#2: Put the relay coil on the parking light wire you just cut, switch side parking wire goes to one side of the coil, the motor side to the other

#3: hook the normally open side of the relay to the horn wire and supply ground or 12V as necessary to the pivot of the relay so the horn is powered

Got it?