Switch to activate perimeter alarm if Tailgate is opened

[ControlNode]

Ok, I took a deeper look at this option but the way I read it at first was it was just a tap into power.

So, I think this is what you are referring to as depinning the BCM connector.

De-Pin (Pin #14) at BCM and relocate it to a (Added 2-Wire Connector) Female Half
The other wire of that Female Half - Repin to BCM Pin #14

The Male Half of the connector - Will Feed the Reed Switch (Input)
The Reed Will Feeback to the 2-Wire Connector (Output)

Rough Drawing:
Dashed Line - De-Pinned (Pin #14) Relocated to 2-Wire Connector
Solid Line - Re-Pinned (New Wire) to Pin #14


I have to say that yes this will work, but it is still a delicate area for some who are not familiar with de-pinning a connector.
If it gets damaged it is a costly fix.

Edit:

So, for this option, we can get a Terminal Kit (5-Terminals with wire)
De-Pin and cut off connector, Wire this connection directly to our added 2-wire connector (Butt-Spliced together.

The other unused wire on that connector we (Butt Splice) the new Terminal Pin from the kit and place it back into the BCM connector.

Then the other half (Female) of the 2-wire connector, we loop back to the Reed Switch (Input) and the Return (From the Reed Switch) will connect to the other wire on that connector.


Terminal - Ford (DU2Z-14474-AA)
du2z14474aa

• MSRP:$25.42
• Discount:$8.64 (34% off)
• Sale Price:$16.78

This Kit: Is a replacement for P/N of OE Pin - P/N 9U5T-14474-DA.

AGAIN:
This is an alternate option, but be CAREFULL on removing and reinstalling the pin

Yes, that was the tought I had. I will add, that if you are wanting to make an easy to install kit for others to use, I would look into the idea of just getting male and female connectors that are compatible with C127 at the hood switch, then just make a T-harness that you plug inline between the hood switch and the harness there.

hood        2 ---------- 2     harness to BCM
switch      1 --      -- 1     harness to ground
                \    /
                |    |
         to new switch at tail gate.

If you have no plans to update to a Pi for selective control of that (only allowing the tailgate to activate that open signal if opened after arming) an even simpler way would be to use a ground at the back and have that replace the ground going into the hood switch. Also, if you can get pins for the connector you disconnect when removing the tailgate (maybe C411) you can add those to pin 7 (if it is C411) so it looks almost OE if you wrap that wire with the harness. But if you remove the tailgate you may need to update the dummy plug for when the tailgate is removed to jump pins 5 and 7 (again if C411) so that the hood switch still works while the tailgate is removed.

hood        2 ---------- 2     harness to BCM
switch      1 --      -- 1     harness to ground
                \
                |
          ground from to new switch at tail gate.

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