2001 Yaris flashing hazards when ignition off!!!?!

[CTScott]

My first thought was that it was an alarm system that got in a strange mode after the battery died, but as you don't have an alarm, that can't be the case.

On your 2001, all of the circuitry involved is located within the flasher relay module. The module gets ignition switched power from the 10A GAUGE fuse and constant power from the 10A HAZ fuse.

The flasher module has two outputs to the left and right side lights and three inputs from the left and right turn signal switches and from the hazard light switch.

If your car has power door locks, then there is an extra connection to the hazard input from the door lock control relay. Since the problem only occurs with the ignition off, if you have power locks then I have a feeling that the Door Lock Control Relay may be the culprit.

If you have power locks, try pulling the 25A D/L fuse from the under dash fuse panel to see if that makes the problem stop.