Car Alarms: 2003 dodge durango keyless entry, dodge durango, timer module

Question
I am installing an alarm (prestige aps-25ch) into a 2003 dodge durango and I understand the factory lock/unlock system is a 5 wire that uses resistors and relays.  I am unclear on how to set up the relays, I did see the diagram for the five wire reverse system on this site however where would I put the resistors in relation to the diagram? Also i've seen other sites that say two resistors need to be built for the lock and two for the unlock and directechs is just telling me to do one for lock and one for unlock.. which is correct? I'm totally confused here because most of the alarms I've ever installed have relays built it for 5 wire systems and this one doesn't.  Also if you have time I've been reading alot about having to diode isolate the door triggers, some places are saying to isolate normally and others are saying to isolate with a relay, can you clear this up for me.. im a visual person so any diagrams would help.

Answer
No in this case Marcy, you will need
to do relays, set up as negatives
and use pin 30 on the relay to go to
one point on the single lock/unlock wire,
and on the second relay, using the other resistor
on pin 30, to another point (1 inch) on the same
lock/unlock wire using the following values:

Lock requires a negative trigger thru a 820 ohm resistor.  

Unlock requires a negative trigger thru a 330 ohm
resistor. This wire is found at The CTM
(Central Timer Module)
in the driver kick panel.

See single wire negatives at www.relayhelp.com
or use 2 negative relays and use pin 30 on each for the resistors.

I hope that clears that part up.

On relay isolation, not needed here, or in most
cars for that matter. Use a 1 amp n4001 1/2 watt
diode, cathode bad towards the wire you are
going to address, and that will clip back some
of the resonate feedback from all the doors.
If you simply don't want to mess with it,
talk to the customer about a microwave/motion
sensor and depend on that, which actually is
more precise then diode isolating door triggers.
But of course, it's your call.

I hope this all helped.
Good to get some conversation and
questions form a woman/technician,
you all are rare indeed, and most welcomed
anytime!

Thanks for stopping in.

ALARMTEK
ALARMTEK.net


(sign up at www.installhelp.com !) we need ya!!