2013 F250 Alarm Wiring

I'm in the middle of installing a Viper alarm in my F250. Everything is pretty straight forward using the T-Harness, however it calls for tying into the door trigger and lists two locations possible for the tie-in. 1 is the BCM 26-pin connector, and the other is the driver's kick panel harness (GREEN/ purple). I'd prefer the driver's kick panel, since all of the my other connections are on that side of the vehicle. The challenge is that there are no less than 5 wires in that harness that are GREEN/ purple. Any idea how to identify which one?Clark Harbaugh

Probably the easiest way is to go to the BCM in the PKP.  There you have an exact location.  Info from ReadyRemote :

Door Trigger     GREEN/ purple  - N.C.     @ BCM in passenger kick, black 26 pin plug (C), pin 9

Just remember that these door triggers in Fords are NC (-) type.  That means they test as a (-) when the door is closed and go

to an open state when the door is opened.  Set your DMM to 20V DC, Red lead to +12V constant and Black lead to suspect wire.It will show +12V when the door is closed and go to a float ( ~0V ) when the door is opened.  Once you identify / verify the wire atthe BCM you could look for a similar sized / colored wire in the DKP and use the same DMM test procedure. 

When not using a full featured bypass module, most installers go to the BCM for the Parking Lights, door locks, etc.

Soldering is fun!

When using the actual door triggers, you have to find all of them, and diode isolate them, as well as isolate the alarm trigger from the BCM inputs. Each front door, and both rear doors (crew cab) have an individual trigger. It's a lot of work. On the Ford trucks I've done, I use the (+) door trigger input, and wire it to the dome light switched (+) blu/blk, and program door warning chirps to OFF. It's a lot less work.

Maybe the domelight wire color has changed and is now grn/purple, which is why there are so many of them, and is why the ready remote site says use it.  Test.

Thanks, guys. I ended up running to the BCM. Working fine now.Clark Harbaugh