I'm having trouble identifying the theft-alarm horn relay. I removed the bolts holding the relay box so I can see it, but none of them are labeled. The only relay that has a black wire with blue stripe and a light green wire with a black stripe is on the larger of the boxes but I think that relay is the starter relay. I can't tell from your attached image the orientation of the relay box to determine the theft-alarm horn relay.
Here's a picture of my relay box. This is in a 1998 Eclipse Spyder GS. Sorry for the poor image I don't think my camera was made for close up shots.
edit - ah I should have done just a little more searching. I found a picture I'll post here to help anyone identify which relay is the one they need.
One more thing, from your last picture where you have the diagram about cutting wires, the box is labeled as 44X - the "theft alarm starter relay" - so If I do not cut the wires the horn and lights should still not be on but the car wont start until I use the key to reset the alarm ? That would be ideal as all I want is for the damn horn to stop sounding.
edit - ok so I removed the horn relay but did not cut the wires, and my horn still goes off. Am I mistaken that the wires to cut are for the starter because I'd rather not cut them. If I ever want to put it back together it's a tight spot and I'm not sure I could splice the wires under the dash.