2008 Ford Ranger - Electronics are protesting

turned off passenger air bag light on, door open alert picture lit up on info dash screen, alarm sounds, and doom light comes on and stays on

Maybe one of your door ajar switches is bad?

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Sounds to me like the car thinks the passenger door is open when it is not actually open. Door ajar switches were a common Ford failure point.

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How old is your 12V battery under the hood?

Sometimes you’ll see weird electrical stuff when the battery is about to die.

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and along those lines, how clean and tight are the battery terminals?

Tester