To Relay Or not to Relay..

I just need to get a negative pulse from the drivers door lock of a 2002 dodge ram quad, for a remote start activation...............   Do I need to use relays for this, or resistors???   

No alarms, just factory keyless entry..

thanx

You would need a relay.  The only wire you can tag is going to be the drivers door unlock motor wire.  You should also take into account that when you hit unlock on the door the truck will start.  You could come up with a way to bypass the switch.

Thanx for the speedy reply auex,That's what I was wondering............  Is there another way to do this ???

 This is getting much too complicated............  How bout we try this from another route.........  When I lock the truck using the oem remote, I get two horn chirps confirming that it's locked.............  Is there any way to get the negative pulses i need for the remote start from these horn chirps????

           And if so, where would I begin to look ???

just use a relay connect to door lock motor wire Tan\pink or Tan\black in drivers kick panel wire relay as follow

PIN 86  connects to door lock motor wire

pinn 87 and 85 to ground -

pin 30 will be you negative trigger

 don't use pin 87a

 it's very easy I do this all the time , you car will remain lock, and your remote will operate when the car is running. Good Luck!

Hey, Great solution................  thanx for the info.......

    I've just got one question though, If I wire this exactly like you said, what will happen if I use the power door lock switch(on the door armrest) to send two lock commands??       Will this activate a remote start ??