I can VERIFY - that if you install a kill switch correctly on the 2017 (4th GEN) trucks, that use a push button and that have remote start you can start the truck with the remote key fob, but you CAN NOT start the push button portion of it to drive off (ignition key trucks are probably the same as they have the SAME wiring as the push button start, but I don't have one to test).
Here's how you can verify for yourself: Crawl under your driver's side dash, and locate the harness for your push button start and then unplug it at the button. Close your truck doors and walk away. Double-press your key fob remote start, and your truck should start right up. With your truck running from remote start, get in your truck and attempt to go into normal "run" mode by pushing on the start button/turning the key, while holding the brake pedal with your foot. Note that your start button normally has lights indicating it's current status (OFF/ACC/RUN). With remote start, your "RUN" light on the start button
should be flashing, but it won't be. If it is, you probably disconnected your mic harness and not your push button start.
The point of this is, that if you are thinking of installing a kill switch, you can cut into one of the following: the red wire (Positive power, 12vdc), the black wire (ground), or the violet-brown wire (signal) - and splice in to wire in a hidden kill switch. Personally, I'd say go with the red wire. I'm not sure if you can splice into the Security K Line Communication - but I don't see why not - I just don't know if it'd stop someone from starting the truck.
I'd also recommend cutting in as far away from the push button as possible, as a thief might realize what you've done, and just look under the dash panel to find your splice. If you put the splice near the Radio Frequency Hub side of the harness, a thief won't be able to QUICKLY find it - note: I said "quickly"... any thief, given enough time, tools, and freedom - CAN FIND what you've done and bypass the kill switch.
The button (or buttons) should be located in a hidden location(s) - preferably in easy reach from the driver's side of the vehicle, but they don't have to be if you've got enough wire and don't mind having to flip a switch before you climb in the truck. Just put them where someone isn't going to necessarily look right away.
Notes: You can put MULTIPLE kill switches in series. They would ALL have to be flipped to the correct positions to get the truck to start, but only ONE of them has to be in kill mode to disable the truck from starting.
Also, you can use DPDT (On/Off/On) switches if you want - then you can wire each switch one way, or the other, and it has to be in the correct position on each switch, and each switch can be a different position for start - for example: If you have three switches: one switch with pin A as on, the other with pin B, and the third with pin B, then you'd need to have the switch 1 in up, 2 in down, and 3 in down, to enable your truck.
You could (and SHOULD) put each switch in a different hidden location if you decide to do this, so a thief wouldn't be able to find all of them quickly, and they'd have to figure out the sequence - here's the type of switch I'm talking about (you can get six of them here: (
https://www.amazon.com/dp/B07MV5K2JV?ref=ppx_yo2ov_dt_b_product_details&th=1):
The number of possible switch combinations is the same as 2^(# of switches) - so 2^6 switches = 64 possible ways a thief might have to try to set the switches before your truck will start - plus they'd have to find all 6 switch locations... If you use just 3 switches (2^3 switches), it would mean a thief would have to try up to 8 different combinations before they could get the truck to start unless they got lucky and guessed it right - and again, they'd still have to find all the switches. You could even throw in some "dummy" switches with wire that leads to nothing and nowhere...
Only you would know which were fake and which were real. I know - that's all overkill.. but still...
Here's the relevant section of the wiring diagram for the ignition key/push button start circuit (the big blue long rectangle at the top is the RFH side, and the smaller ones are the ignition key (left) or push button start (right).
Hope you find that helpful if you're thinking of adding a kill switch (or switches) somewhere!
V/R
Black-Wolf
