That looks like a flasher of some kind. On the alarm issue, the aftermarket ones are a pain. They will quit or are wired in wrong etc. The thing to check is if the ASD relay is working in the power distribution center. That is usually what they disable. The factory one does too. Might have to have the little woman work the key while you put your finger on it and see if it clicks. You can pull the relay and see if it gets power when you turn the key. Also check the fuse for it in the same place