1999 Mazda B2500 automatic won't crank.

Hello, dash lights that stay on while the key is in the off position leads me to think there is a concern in the wiring or switch of the ignition system that is still allowing the instrumentation to have power when it should be off. Circuit testing is all you can do to trace down the source of your concern. Ensure your vehicle is securely in the park position -- which can be verified by looking at the position noted for the transmission range sensor.

Just a thought as I have had some experience with this on a Ford ranger which had an aftermarket alarm system installed that the current owner wasn’t aware of - I simply removed the alarm to repair repair the vehicle.. Just something I have seen and it may not be related at all.