2002 ex accord, python 900 alarm

Hello all, great site - thanks for all the information.I am tracking down the current wiring diagram for my car year make and model:2002 Honda Accord, EX.The alarm for the install is a Python 990As far as I can tell, there seems to be two types of wiring diagrams floating around. One indicates that the yellow wire in the ignition harness is Accessory, another diagram indicates its a Second Ignition. Now considering this alarm has both sets of hook ups, which diagram am I really look at to be correct?Another question for the door lock and unlock. I have been doing searches ( Link to search) for any information I can find and map out before I do the install.Trying to iron out the door unlock and lock process. I am noticing a lot of talk in other threads that its all controlled by one wire, with a (-) power string. Now this may be self explanatory once I open everything up and multimeter test my harnesses, but does anyone have details on this such of a deal? Please see the included diagram for the door lock connections for more detail. I am sure I will have more questions as I keep my research on, thank you all so much.-Jon

I'm sorry, I forgot to mention that this car is a Coupe.

Anyone have any comments on this? I've done more research on the door locks, without looking at it and testing it it seems its going to be a 3 wire (-) pulse system? Ground, Lock and Unlock

Thank you for that information. I figured it was going to be more testing each wire to confirm which I connect to. I am also installing a battery backup for the alarm, so as far as the parking lights go - should I run then as a relay instead, considering the battery backup instructions warn highly that during remote start the draw from the parking lights could over do it on the limits for the battery? Personally, I am not really looking to have the parking lights flash - the LCD will tell me if the car is r/s or not, so why announce to everyone else that my car is currently running...

I was doing some more research on the wiring grid provided with the alarm. As far as the harness goes for the lock unlock, it seems some have mentioned that if you use the factory arm / factory disarm (-) leads off the alarm harness, it will unlock then lock the car on r/s. Obviously this is something I do not really want to happen - but it seems that these two wires are the only ones that send out a pulse (-) in the line. The door lock harness seems to segment between both (+) and (-). Well my question is, which set of wires (the door lock harness or the factory arm / factory disarm (-) wires) do you recommend I connect. I would think the factory arm / factory disarm (-) wires are the ones to connect, as the 'Disarm but don't unlock' blue wire will be grounded when r/s is activated letting the system know that we are disarming the alarm but not grounding it, which would block the factory disarm (-) from unlocking the doors. So I would be connecting those wires but NOT connecting the door wire harness. Does that sound like a scrambled mess? Sorry if it does, its late. It seems the locks are the only thing I am stuck on mapping out before I install everything. Thanks all for your help!

Well I am not going to know until I sit down and test the wires on how the brain reacts, but I am going to say it should be put in like this: factory arm / factory disarm (-) wires go to the lock and unlock wires on the car. Since the factory alarm arms/disarms with the lock and unlock, these wires would do the deed (considering they output a pulse (-) signal). The blue wire on the drivers door will be connected to the ground pulse wire to tell the alarm to disarm but stay locked. The lock/unlock wires will not be used (looks like they would be used with relays) Does this look all correct?

frunkis wrote: Well I am not going to know until I sit down and test the wires on how the brain reacts, but I am going to say it should be put in like this: factory arm / factory disarm (-) wires go to the lock and unlock wires on the car. Since the factory alarm arms/disarms with the lock and unlock, these wires would do the deed (considering they output a pulse (-) signal). The blue wire on the drivers door will be connected to the ground pulse wire to tell the alarm to disarm but stay locked. The lock/unlock wires will not be used (looks like they would be used with relays) Does this look all correct?

I guess it does look fine, so I'll keep on with the research unless someone chimes in on it.

On my alarm, I have to options. It comes with a relay pack for the door locks, but also has the option to run wires directly out of the brain for the locks. Question being, if I am not going to use that relay pack, what are the polarity on these two wires coming out of the lock port on the brain? Are they the pulsing (-) format we need for our locks?Or am I going to end up using the relay pack that came with the Python 990 - and if so anyone know how to wire this up? It is not even mentioned in the install manual.

Well for reference for others, I found a diagram to use the relay pack that comes with the alarm. Click here for diagram Now that it looks much more straight forward, I have my last piece of the puzzle for the install!