I have a 97 honda civic ex coupe and when i purchased it it already had a aftermarket stereo in and the keyless entry worked. but when i went to put my alpine head unit in i cant figure out what i did wrong and cannot get the keyless entry to work again?? someone please help!!

 

Well the keyless is built into the factory radio. So the factory radio should be relocated below your radio somewhere and wired up. Did you remove it? Did you change the wiring to it?