the inside switch in the door does work.
the trunk button does work on the door, and the remote.
the lights go on, but I don't think they flash. But, I'm not sure about that point.
No, both remotes did not fail at the same time. They failed months apart.
No, I don't use both remotes equally. One is just a backup remote.
The trunk button and the alarm button on the remotes work, but the door open & close buttons on both remotes do not work. One battery is brand new, and the other was tested at radio shack last night and is good.
I had to climb in through the trunk to unlock the back door, because I could not get in any other way. The key does not open the door either!