If someone breaks into your car and tries to hotwire it, they're probably familiar with theft prevention measures like this one. Therefore, it is important to conceal your switch. There are a few ways you can do this; if there's a hiding place that's easily reached from the driver's seat, that's one option. However, this too is probably easily discovered by any but an amateur thief--there are only so many spots one can hide the switch and still keep it accessible.

As such, I personally decided to hide the switch in plain sight. My Celica has a button in the dash which prevents the passenger window from rolling down. This is an entirely useless function--but it's a toggle-style switch which would not look at all out of place. Other rarely used switches could also be used--though I'm not sure of the legal implications, one could use the emergency flasher button. If you don't have any switches you don't use, consider wiring another switch to control the function of something you do use and assigning the original switch the killswitch function.



Since the whole point of installing this switch, for me, is that I often forget to remove the key from the car, betting that I will remember to turn off the toggle switch each time I leave the car seems imprudent. I therefore decided to install a momentary switch as well--even if I leave the toggle switch activated, the momentary switch still prevents theft. If both switches are open, it's a double line of defense.



