OK, so here's the update....
I used a digital multi meter to measure the current between the car's positive terminal and the battery. After disconnecting the positive leads, and connecting the multimeter in series, once the connection was made the hazard lights started flashing. The multimeter was reading all kinds of numbers, flashing randomly. I disconnected that series connection, and when I went to put the car's positive terminals back on to the positive connection of the battery, the hazard lights started flashing again and now won't shut off!
I disconnected the battery terminals and tried reconnecting them again, and the hazard lights are continuing to flash. The voltage is still reading 13.4 V before starting the car, and the car does indeed start. Once the car is started, the voltage increases to 14.4 V, but the hazard lights will not turn off. Even when moving the hazard lights toggle switch up-and-down, the hazard lights will not shut off.
At this point, I really don't know what to do! I have the battery disconnected from the car. As soon as the battery is reconnected, the hazard lights start flashing and will not shut off.
Any suggestions of what might be happening here??? Help needed!