Replaced Stock stereo in 98 Civic EX now alarmKeyless entry does not work?

Contact crutchfield radio / electronics they will provide you with a free wiring harness when you purchase the radio thru them which will allow you to connect your radio without effecting the cars other electrical systems.

the 1996 to 1998 Honda civic has the keyless entry module built into the factory radio, you will have to wire the factory radio in-line with your aftermarket radio, most people then hide the factory radio under the center console. your other options would be to go without keyless entry or install an aftermarket unit.