Got mine from a used car trade in when I was working at the dealership (so no help with brand info). I just noted the color wires it came off from on the ignition switch and tapped them into mine. Then just brake pedal wire to kill it if you touch the brakes (anti theft), one tapped into headlight/parking light circuit, and one tapped into a wire going to the lock circuit behind the door panel. Mine does have some kind of button on a harness that was under the dash that I think is used to program the pass-lock or whatever anti theft is in the ignition and is also used to adjust run time, valet, etc. Even supposedly can be programmed to start up every so many hours if desired to keep it warm but I have no idea how to program it since I didn't get a manual and never bothered to google.
You just have to remember to turn the hvac setting to whatever you want before you shut it off so that it comes on when you start it. Not quite as nice as my new truck that knows outside temp and turns on heated seats and steering wheel or whatever but I use it every morning in the winter time. Push the button when I get out of bed and it's nice and warmed up when I walk outside.
