Hey, I've got a 96 ES 300.

I recently changed the gauge cluster lights as the speedometer & tachometer lights were burned out. The only problem was I did not disconnect the negative terminal of the battery before starting the little project and now the car cranks but won't turn over. My thinking is I may have activated the anti-theft system when I disconnected the security plug from the cluster.

Please help, it was my daily driver up until a week ago.

 

I assume you checked all fuses? Try locking then unlocking the car with the key (drivers door).