96 Honda Accord horn output

If you're sure you have the right line, and don't mind doing some tinkering, you can put this together to drive your relay- You have to make sure the voltages it's putting out is stable and not just floating, though. I just wonder about the 3V reading you get, and still think it's strange how the signal is inverted from what you'd normally expect. If the alarm's driver output failed, I'd expect it would be just stuck at one state or not drive high, not come out backwards. Anyway, you could try this- Parts, not counting the relay, should be under a buck-

WOW..... I don't mind doing the tinkering and stuff but I have no idea where to get any of those parts. I have the relay. That's about it. Where can I get the rest and can I get the exact names broken down?

and if you don't mind, walk me through this. I'm not really even sure where the numbers (1-3) come from or stand for.

You can get it from www.mouser.com, or try local Radio Shack- links for Mouser: CD4001 BS170 1N4001 They have no min order, but the shipping'll cost more than the parts, so you might consider stocking up a bit. Or, if you want only what you need, you could send me a SASE and I'll send it to ya- Numbers define the pins on the chip; if you look at the links, they have datasheets that show a picture of it and spell out the pin positions- then just connect the dots, electrically speaking-