Originally Posted by some dude
I have an 06' WRX and the power wire going to the bulb is really short. When they installed in they wrapped it around some other input to the lock cylinder. I broke off on of the tabs on the plastic light housing. And I found out that the car will not stay running with the light housing off of the lock cylinder. My security light stayed on until i put it back on.
I'd bet the new security key chip receiver is inside that light housing.