Anybody know what this wire is? (RES Diagnostic)

I’m in the middle of wiring up my
Pop n Lock and came across this single yellow wire labeled “RES Diagnostic” in the passenger side kick panel, just above where I’m tapping into my door locks for the pop n lock. It’s not plugged in...

any ideas what this is or what it does?

 

Remote engine start. So a tech can start the truck from the engine compartment I'm thinking.

 

Self destruct. In case of bad guys.

 

Weird...but okay. Wonder why it’s unplugged, I do have remote engine start...

 

Maybe your truck has remote start, but it was disconnected because the factory remote start is really quite shitty? I dunno.

 

That’s a possibility, I’m second owner, truck came with a Clifford 2 way, 1 mile, remote start that works great. So I’m guessing you hit the nail on the head...

 

Wondering the same thing about this cable, as I seem to have factorry remote start that does not work. What is RES diagnostic?