- I had an alarm installed today. The lock works, but unlock only works for about 15 seconds after the car is turned off. Other than that, I have to remote start it for the unlock to work from the key fob. If I get in the car and unlock it and lock it, the key fob will unlock it as well like nothing is wrong. It’s sort of annoying because I got an alarm to have keyless entry and now I only have an alarm. Installer says it’s because my security light is on. Any advice?