Dash lights turn on and off and engine shuts off?

2007 FORD CROWN VICTORIA
135,000 MILES • 4.6L • V8 • 2WD • AUTOMATIC
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MARK6466
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I bought the car and the first day the cluster went haywire, and the engine shut off. Put a new alternator and battery in it. Drove about 60 miles. The instrument cluster didn’t work at first but then came on mid trip. No other problems. Parked it and About 2 hours later it started up started out 10 miles in the alternator light came on, the lights went off and soon after it shut off. Can’t find any bad or corroded connections. Don’t know where to look.
Mar 4, 2023 at 12:00 PM
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STRAILER
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It sounds like the ignition switch is bad but to be sure we need to use a test light to see if the wire colors grey/yellow, white/violet and violet/orange have power when the engine and cluster shut down with the ignition switch on. Please use this guide to help and I have included the ignition switch wiring in the images below to see what I am talking about.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Check out the images (below). Please let us know what happens.

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Mar 5, 2023 at 4:54 PM
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MARK6466
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Super helpful info. The ignition switch is loose but seems to be okay for now. The lights in the instrument cluster are still not 100% so I’m digging into that as I go. Turned out the brand-new alternator was bad. It had zero output. I was reading the battery voltage feeding back into the alternator. As soon as I put in the replacement all the other issues went away.
Mar 12, 2023 at 9:18 AM
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STRAILER
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Glad you could get it fixed, thanks for letting us know. Please use 2CarPros anytime we are here to help.
Mar 13, 2023 at 12:05 PM