Relay buzzing

I just put in a new eclipse cd changer into my car. It needs power so I hooked it up to the iginition and ground that the head unit uses. (I needed to test it out fast so I didn't add in the additional wiring and relays.) Well it worked great. I played it for about an hour. The next day I turned on my system and my head unit wouldn't come on. I also noticed that my dome light didn't come on. I found out that they run on the same lines. I found a blown fuse and replaced it. Everything seemed ok until I shut my door. I heard a buzzing sound and located the relay that was buzzing. It was the dome light relay. I thought the relay was bad. I went and got 2 more relays but they both buzz. Now I got 3 relays that buzz . The head unit works without the relay I have been using the radio for 2 days now but still can't figure out what is causing the buzzing noise. It only buzzes when the doors are closed. I can also turn the headlight knob to turn on the dome light and that too stops the buzzing. No clue on what the problem is. By the way the relays only have 3 prongs the 87 86 and the 30. Any help would be great. Thanks in advanced.

1999 plymouth neon

Eclipse head unit and cd changer

Factory relays.

James