[b]Originally written by Lethagized, but I've added details and corrected a few bits

[/b]
This is intended for for someone installing an alarm into their BA. I did this on my 1997 model but i only installed the basic stuff. You'll still need a multimeter for installing further options such as engine start and total closure systems.
For further wiring colours go to
http://www.imazda.com/mazdaracer/ALARM_ ... ech_G2.htm
Wiring colours may vary depending on model year
When i describe wire colors such as red/black, i mean the wire is mostly red with a thin black stripe.
You'll also need to study your alarm wiring diagram and get familiar *before* you start tearing the car apart. All i'm going to show you is what and where the wires are for the following systems...
Central locking system
indicator/hazard warning system
Door trigger system
Ignition signal
[i]Central locking system..... [/i]
All BA models are Negative pulse system
Remove the passenger side kick panel and you'll see a green control module. Find and tap into the thin Green/White and Red/Green wires
Green/white = Lock
[b]Green/Red[/b] = Unlock
[url=http://i82.photobucket.com/albums/j250/RobbieRx-7/323F/doorlocking.jpg][img]http://i82.photobucket.com/albums/j250/RobbieRx-7/323F/th_doorlocking.jpg[/img][/url]
[i]Indicator/Hazard warning system.....[/i]
Remove the drivers side trim below the steering wheel which contains the cubby box. [b]Also while you're there, unscrew the trim behind the steering wheel (3 screws underneath, dont remove it, just unscrew it so you can move it around)[/b]Locate the plug/socket in the picture below and tap into the thin Green/Yellow and Black/Red wires.
Green/Yellow = Left hand side indicators.
[b]Black/Red [/b] = Right hand side indicators.
[url=http://i82.photobucket.com/albums/j250/RobbieRx-7/323F/untitled.jpg][img]http://i82.photobucket.com/albums/j250/RobbieRx-7/323F/th_untitled.jpg[/img][/url]
[i]Main 12V supply.....[/i]
On the same connector block as the hazard warning system, tap into the thick [b]Red[/b] wire. [b]Or run your own 12v feed from the battery, through the existing gromet above the clutch pedal[/b]
[b]Red[/b] = Constant 12V+
[i]Door trigger system/door switches for interior light.....[/i]
Remove the drivers side A pillar trim that runs down the side of the windscreen. Locate the thin Red/White wire which is inside the plastic tube [b]wrapped in tape[/b] and tap into it. You can also tap into this wire by the fusebox, but i found it easier doing it half way up the pillar. [b](HughieW - I also found it MUCH easier half way up the pillar)[/b]
Red/White = Negative door trigger wire
To tap into wires without breaking them i use these wire strippers. [b](HughieW - I had no wire strippers, so I used a sharp stanley knife to remove insulation from a part of the wire without cutting the wire)[/b]
[url=http://i82.photobucket.com/albums/j250/RobbieRx-7/323F/Photo-0149.jpg][img]http://i82.photobucket.com/albums/j250/RobbieRx-7/323F/th_Photo-0149.jpg[/img][/url]
They stretch the insulation apart enough to wrap the wires from the alarm onto. This is fine for low power items such as central locking and interior lights, but for bigger stuff such as starter motors and electric windows, you want to splice into them properley with the use of proper connectors. I put a small dab of solder onto each joint to make sure it didn't come loose.
These are the 4 basic things you need to know when installing an alarm. The other wires on the alarm should be self explanatory such as boot/bonnet switches and accessory input wires.
[b]Ignition wire is more of a pain to get to. On the passenger side of the steering wheel, there are some wires wrapped in yellow stuff. Follow those towards the steering wheel, until you find a white connector with several thick wires. This should be just above the connector with the yellow wrapped wires. This connector is a pain to unplug, but unscrewing the bit behind the steering wheel makes it a bit easier. You need to tap into the thick blue wire, or the black/red wire (IG1, or IG2) and connect it to the ignition wire on the alarm loom if yours has one.
Install your siren somewhere in the engine bay, away from anything that moves. Mine is stuck to the plastic battery holdy thing. I ran my siren 12v feed from the alarm, through the gromet near the clutch, along the back of the engine bay and onto the siren. To ground the siren, there is a ground connection on the side of the engine near the lifting hook. I loosened that, stuck the stripped wire for the siren ground under the washer and tightened it up again.[/b]