I didn't read the entire thread, but why not just disconnect the alarm horn?

Yes.

Got it!! Ok, the pic is under the drivers side of the dash. the silver box is the cruise control module, the etacs module is the one located above it (And impossible to get out without dropping the fuse block). you can however see the harness that goes to it & it is easy to get at (pic 2), open the harness & find the yel-blu wire & cut it(as shown). all functions of the alarm have been disabled.

You still get the security light (green) but thats it.

After you cut the wire insulate it, re wrap the sub harness & you're done.

Now if you all will excuse me I have to splice a wire back together.

thanx IslandVR4...went out to disable the alarm and the dumb thing went off so I let it keep goin off so when I cut the wire it would go off and I would know I cut the right one. It worked so now hopefully that doesn't effect anything else in the car. Thanx again.

Just cut the Yellow w/ blue wire & successfully disabled alarm.

If like me the yellow/blue looked yellow/green to you, it's surely the right guy. There's only 2 yellow striped wires on this harness, the other is yellow w/red.

sorry to revive such an old thread, but I figured it would be better than starting a new one. I do have a few questions as well as some info hopefully others could use in the future. First off, I would like to know where the 'brain' of the oem alarm is located? so I can unplug it and perm. disable it. On my 91 vr4 it is not above the interior fuse block as it was for others nor did I have a yellow/blue wire to cut to disarm. I have had alarm and door lock issues on this car since day 1. My solution was to get aftermarket real alarm with door actuators (all of which are already installed and working great) Now the problem is when I lock my doors it arms the factory alarm. I thought about unplugging the oem door lock motors and keyswitchs in the doors but if for some reason it arms the oem alarm I wouldnt have a way to disarm it with switches unplugged.
Now, the 2 boxes I have above the fuse box, 1 of them says omron and has a large yellow plug going into it. I thought this was the alarm, but I have it unplugged with same issues so obviously it is not the alarm. The other box has 2 plugs side by side and it has something to do with the power windows being when I unplug it thats the only thing that doesnt work. Like I said neither of these have the yellow/blue disarm wire everyone is referring to.
Just so everyone else know, aftermarket door actuators are cheap and easy to install on our cars. I got mine at pep boys for 7$ each. Directed part number 524t. They will also work with pretty much any alarm system with 2 relays (look up 5 wire aftermerket actuator door lock relay wiring for diagram) anyhow I hope someone has some insight on this and also hope it helps someone else on down the road