Ground pulse after start to trigger defroster

Question

My car (2016 Juke) is a negative 'pulse' to trigger the rear defroster. I keep reading about using the Aux1 to trigger, I don't have an Aux1 that I know of and if I do it's not listed in the install guide. Basically, AFTER the car starts I just need to pulse the pin at the BCM to ground to get the defroster going.

Any help is appreciated. Don't have my service model # stuff with me and I'm not taking the unit out of the car just to find it.

It's an EVO-ONE NIST1 with the T-harness.

Answer 1

Yellow/Black is an AUX output when option 25 is changed to something. 

https://cdn02.fortin.ca/download/33021/rf642w-install-guide-33021.pdf

 

If you also enable option 39.2. The AUX will automatically trigger once temperatures are below 5c. 

 

Comments

I now have a second question, in the Fortin spec sheet it states it has a SPST and a DPDT relay built in... can I use these (as I don't see it mentioned anywhere else) to control a switch by opening or closing these contacts?

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no, it's refereing to the wiring of the red connector along with the green/red and green/white. Those are controlled by the bypass firmware and cannot be adjusted.