OEM Remote with aftermarket security alarm

Question

Hello,

 

I want to add an aftermarket alarm and continue to use my OEM FOB Key. Here is why:

I have a 2011 Dodge Durango with FT-CH4-DC installed (add-on remote start) and works by using the OEM remote by pressing the lock 3X.  So I want to keep that.

But my car does not have an alarm security system and I wan to add an aftermarket alarm and continue to use my OEM FOB Key.

If this is possible, can someone give me some ideas which alarm would work for me?

 

Thanks

Answer 1

I dont know about the FT-CH4, but both evo-one or evo-all can offer both remote start and alarm via the oem remote on this vehicle. 

http://fortin.ca/en/vehicles/dodge/durango/2011/

Comments

I don't want to replace the  FT-CH4... I just want to add an alarm....

I found one: COde Alarm CA3051..... now I need help with door locks:

 

Here are my door wire configuration: 

Lock: Light Blue / Orange 
In Driver Door Module 
Through a 330 ohm resistor 

Unlock: Light Blue / Orange 
In Driver Door Module 
Through a 100 ohm resistor 

On the Code Alarm CA3051 installation manual says: 

LT BLUE/RED 
ARM INPUT 
Connect the Lt Blue/Red to the lock motor wire of the drives door actuator. The 
lock motor wire will pulse +12 volts when the LOCK button is pressed on the 
Factory (OEM) transmitter. 

LT BLUE/BLACK 
DISARM INPUT 
Connect the Lt Blue/Black to the unlock motor wire of the drivers door actuator. 
The unlock motor wire will pulse +12 volts when the UNLOCK button is pressed 
on the OEM transmitter. For vehicles with two stage unlocking, the unlock motor 
wire of the drivers door actuator will pulse +12 volts when the UNLOCK button is 
pressed the first time (unlocking the drivers door), and will not show any pulses 
the second time the UNLOCK button is pressed (unlocking all remaining doors) on 
the OEM transmitter. 

LT BLUE/GREEN 
UNLOCK SENSE INPUT 
Connect the Lt Blue/Green wire to the positive or negative unlock wire from the 
door lock/unlock switch, or any passenger door unlock motor wire. 
a). For vehicles with two stage unlocking, it is very important that the Lt Blue/ 
Black wire does not receive a pulse when the drivers door only is unlocked using 
the OEM transmitter. 
b). For vehicles with single stage unlocking (all doors unlock with one press of 
UNLOCK on the OEM transmitter), connect the Lt Blue/Black to chassis ground. 
Note: You can select the polarity of this input by changing DIP Switch #2

 

ok... just tell me if I'm wrong: 

I will use both: LT BLUE/RED(ARM INPUT) with a 330 ohm resistor and 
LT BLUE/BLACK (DISARM INPUT) with a 100 ohm resistor 

and both with a diode. 

Also I'm not going to use the LT BLUE/GREEN(UNLOCK SENSE INPUT). 

Is this correct?

---

You might be better directing your code alarm question to them...Not familiar with their products...

But as for this part:
Lock: Light Blue / Orange 
In Driver Door Module 
Through a 330 ohm resistor 

Unlock: Light Blue / Orange 
In Driver Door Module 
Through a 100 ohm resistor

Sounds right to me!

This is a one wire system and it is negative trigger.

 

Answer 2

Adding an aftermarket alarm to an existing remote starter needs a couple of issues addressed.

 

1. Most alarm system go off when the alarm brain senses the IGN being powered up (remote starter activated) So either connect the alarm system's ignition wire to a wire that is not powered up by the remote starter OR a relay maybe used to isolate the alarm system's ignition wire.

2. Most alarm systems have a "shock sensor" included, either external or internal, if external, same issue above, then vehicle remote starts, the shock sensor will detect vibrations caused by vehicle starting and start ringing. again the shock sensor will need to be bypassed using a relay activated by remote starter, IF internal, there is really no way to bypass the shock sensor.

3 Most new vehicles either have autolights that need to be shut down by simulating a door being opened, if an aftermarket alarm is installed, it will see the door being opened and start to ring,.

This is why a remote starter/alarm is recommend to not have to do any of the above since the alarm/starter will do it all internally automatically.