posted
I have a couple of Q's about factory alarms.
1. Why do they have a disarm wire?
2. When you integrate an alarm or keyless entry or remote start How is this going to affect the factory alarm? ex. the alarm will send a negative pulse to the factory alarm to shut it off.
I'm still having some difficulties figuring out installing aftermarket remote starts with oem alarms.
As much information as you guys can give me would be great.!
posted
Factory alarms have the disarm wire for many reasons, the least of which is that it used to be the only way to arm and disarm the alarm before they were doing keyless entry. Now, it is still there so that a lost remote isn't a big deal, and the theif who works at the dealership will not have a chance to code another remote to work with it. Alarms that have a negative output for door unlock can disarm the factory alarm rather simply. An aftermarket remote starter can prove to be a real pain nowadays, the manufacturers are doing some very weird things with the ignition keys and security systems. New GMs need to be supplied 2 different resistances, one for start, and one for the engine to run, and still prove to be a problem to not get the "security" light to stay on. Most of the time, the factory alarm will need to be disarmed in order for an aftermarket remote starter to operate. I used, at one point in time, an alarm that integrated with the factory keyless entry to turn it into a full fledged alarm system, but cannot remember the name of it. It armed when the doors locked with the remote, and disarmed when they were unlocked with the remote or key (disarm switch in the lock its'self). Hope this answers your questions.
------------------ STILL waiting to hear a GOOD pair of HLCD's!!
If it dont fit, force it... if it breaks, it needed to be replaced anyway...
posted
audiophyle, Clifford makes a piece called the XL100 that you may be thinking of.
As far as why factory uses a disarm wire, it's like audiophyle says, in the event you lose or break a factory remote, you can still drive your car. Some vehcile such as honda and saturn have no external disarm wire which makes it a pain for remote start integration, you have to pack both remotes.
------------------ Shaughn Murley Extreme Audio By Design TEAM HERTZ CANADA Western Regional Manager
Posts: 128 | From: Red Deer, AB, Canada | Registered: Nov 1999
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posted
Some models Arm/Disarm with lock/unlock of the car....others need to see a Ground pulse tru a resistor like 1500ohm or 700ohm (just drops the voltage a little)
Posts: 78 | From: Erie, PA usa | Registered: Jan 2000
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posted
Refering of course to MultiPlex door lock circuits, where the factory uses one wire from the door to control a # of functions, ie. door locks/door pin/window motors. Jeep takes this one step further and does an infinite # of functions through a mere 2 wires.
------------------ Shaughn Murley Extreme Audio By Design TEAM HERTZ CANADA Western Regional Manager
Posts: 128 | From: Red Deer, AB, Canada | Registered: Nov 1999
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1. If someone has a factory alarm and want toadd remote start, the remote start has to send a signal to the alarm, thus disarming it, so that igniton "kill" doesn't work.
2. People out there actually opt for this? I mean your car is now unlocked with it started. Right? Can't anyone get in an put that baby in drive an drive off.????
3. Help me clear this up with the factory disarm wire. So lets say my remote dies, how does this wire help me, the owner? Is there an override button like on aftermarket alarms? I just put my key in an turn, then hit the button?
4. As far as hooking into the factory alarm so that you can use the factory alarm I know code alarm use to make, or still does, a unit that "senses" when the Lock/Unlock signal is sent thus activating itself. with this set up you just added a siren and sensor (motion, shock) to your keyless entry sys. That one seems straight forward.
5. And what about integrating aftermarket alarm with factory. Can they coinside in harmony or must one give in.
posted
Most remote start system have a few safety features to keep your car from being driven away while on remote start. First, the starter will shut off when the brake pedal is pressed. 90% of all vehicles made after about 94 have to have the brake pressed to take the car out of park, so there's the first. Ok, next, remote starts DONT unlock the ignition switch, so, if some were to jump in your car, and somehow get it in gear without it shutting it's self down, they still have a locked steering wheel to contend with. Remote starters also have a hood switch that will shut the engine down should someone open the hood while it's on remote start. Some even have (had) a wire that ran to the neutral safety switch (code alarm's older ones did anyway)and would shut off if the car was in any gear other than park or neutral.
------------------ STILL waiting to hear a GOOD pair of HLCD's!!
If it dont fit, force it... if it breaks, it needed to be replaced anyway...
posted
It's not the wire that helps you, it's the fact that it's connected to a switch in your driver door lock cylinder that allows you to disarm the alarm while unlocking your door the old fashoined way.
------------------ Shaughn Murley Extreme Audio By Design TEAM HERTZ CANADA Western Regional Manager
Posts: 128 | From: Red Deer, AB, Canada | Registered: Nov 1999
| IP: Logged |
posted
Thanks for clearing that up Shaughn, I appearantly forgot to mention that in my previous posts. I think Mercedes has the coolest driver's door lock out that, locks, rolls up the windows... I just think that's kinda cool. Yes, I know other manufacturers now do that too, however, Mercedes was the first....
------------------ STILL waiting to hear a GOOD pair of HLCD's!!
If it dont fit, force it... if it breaks, it needed to be replaced anyway...
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